Raupo

Typha orientalis Presl

Synonyms: Typha muelleri Rohrb.

Common & Folk Names

• Raupo (Māori – primary name in New Zealand)
• Raupō
• Kōpōngāwhā (Māori)
• Kōpōpōngāwhā (Māori)
• Ngāwhā (Māori)
• Bulrush
• Bullrush
• Cattail
• Cumbungi (Australia)

Plant Family

Typhaceae (Cattail family)

Geographic Location

Native Range: Indigenous to New Zealand (Kermadec Islands including Raoul Island, North and South Islands). Deliberately naturalized on Chatham Islands by Māori. Also native to Australia (all states plus Northern Territory and Norfolk Island), Malaysia, Indonesia, Japan, Korea, Mongolia, Myanmar, Philippines, China, and the Russian Far East (Sakhalin and Primorye).

Current Distribution: Widespread in New Zealand wetlands, though significantly reduced from pre-European distribution due to wetland drainage. Approximately 80% of pre-European wetlands have been drained in the last 150 years, substantially reducing natural raupo habitat. Occurs coastal to lowland elevations in fertile wetlands.

Conservation Status: Not Threatened. However, wetland habitat loss poses significant challenges to populations.

Habitat

Raupo is an obligate wetland plant that thrives in freshwater wetland environments. It grows on the margins of ponds, lakes, slow-flowing streams, and rivers, preferring shallow water (15-100 cm depth) with nutrient-rich, muddy substrates. Less frequently found on margins of low moor bogs. The plant demonstrates remarkable adaptability to varying water depths, colonizing areas through rhizome growth that can extend into deeper water.

Raupo plays crucial ecological roles: its extensive root system stabilizes soil and prevents erosion; dense stands provide habitat for eels, waterfowl, spawning whitebait (inanga), native fish, and rare native birds including fernbird, marsh crakes, and bittern. The plant demonstrates rapid growth stimulated by fertile habitat and continuous moisture, resulting in annual biomass production that is among the highest of any habitat in the world.

Historical observations indicate raupo responds strongly to natural disturbance in freshwater wetlands, with expansion becoming much more prominent and sustained following human settlement. Research suggests raupo expanded significantly following Māori forest clearances and associated sediment and nutrient flux, which in turn provided increased resources for human use, raising questions about possible deliberate management by indigenous populations.

Growing Conditions

Sun: Full sun to partial shade. Prefers open, sunny wetland conditions

Soil/Substrate: Requires permanently wet to waterlogged fertile soils or mud. pH adaptable but prefers neutral to slightly alkaline (6.5-8.0). High nutrient tolerance–can thrive in eutrophic (nutrient-rich) conditions

Water Depth: Optimal 15-100 cm standing water. Can tolerate seasonal water level fluctuations. Rhizomes extend into deeper water over time

Temperature: Hardy to approximately -10°C once established. Performs well in temperate climates

Propagation:

Seed: Surface sow seed in pot, stand in 3 cm of water to germinate. Seeds produced in massive quantities from female flower spikes. Germination requires light and consistent moisture. Plant out seedlings at 15 cm depth at water margins during summer-autumn

Rhizome division: Dig up rhizomes, divide mature plants in spring. Take young shoots with some root attached, plant into permanent locations. More reliable than seed

Rhizome spread: Plants naturally invade deeper water through rhizome growth

Care:

• Minimal care once established in appropriate wetland conditions
• Grows vigorously–may require containment to prevent spread
• Remove dead foliage in late winter/early spring (traditional harvest time for building materials)
• No fertilisation needed–thrives on nutrient-rich wetland conditions
• Generally pest and disease-free

Water Purification Use: Raupo is extensively used in constructed wetlands for water purification. Stormwater, sewage, farm effluent, and mining site runoff can be effectively treated through raupo wetlands. The rapid growth and high biomass production enable efficient nutrient uptake (nitrogen and phosphorus removal rates of 23-95% for N, 29-92% for P). Where toxic residues accumulate, plants can be harvested for dryland treatment, making raupo valuable for phytoremediation.

NZ Planting Calendar

Propagation (seed): Spring (September–November) – collect seed heads when fluffy and brown

Propagation (rhizome division): Autumn to spring (March–November)

Planting: Autumn (March–May) or spring (September–November) in wetland conditions

Growth: Perennial aquatic plant; dies back partially in winter, regrows vigorously in spring

Flowering: November–February (summer) – distinctive brown cylindrical flower heads

Harvest (pollen – pungapunga): December–January when flowers releasing pollen

Harvest (young shoots – kōrito): Spring (September–November) when shoots emerging

Harvest (rhizomes): Year-round; traditionally autumn/winter (March–August)

Harvesting Guidelines

Important Note on Medicinal Use: Raupo’s primary traditional significance in New Zealand was as a food and material resource rather than medicinal plant. The plant had profound cultural and practical importance for Māori in construction, weaving, and food provision. Medicinal applications were limited and secondary. The information below covers all traditional uses.

Optimal Timing:

• Pollen: Mid-summer (December-January) when male flower spike releases copious mustard-yellow pollen
• Rhizomes: Year-round, though traditionally harvested when needed. Best quality when plants are actively growing (spring-summer)
• Young shoots: Spring when new growth emerges
• Leaves: Late summer-autumn for construction/craft materials (fully mature, strong)
• Seed down (pappus/floss): Late autumn when seed heads mature and floss is dry

Harvesting Protocol:

Wetland Conservation: Natural wetlands have declined drastically (80% loss in 150 years). Harvest only from abundant stands, never from rare or isolated wetland remnants. Consider that wetland habitats support threatened native birds and fish. Do not harvest from conservation wetlands or areas with rare native species.

Permission: Always obtain landowner permission before harvesting from wetlands. Many wetlands are privately owned or have cultural significance to local iwi.

Technique by Plant Part: Pollen Harvesting:

• Identify male flower spike (narrower spike above female spike, separated by gap)
• Harvest when pollen freely shakes off (mid-summer, usually December-January)
• Gently shake flower spike over container or bag
• Traditional method: Collect in morning, sieve to remove debris
• Take only what needed–leave plenty for seed production and bird/insect food
• Pollen is produced in enormous quantities; harvesting some does not significantly impact plant

Rhizome Harvesting (Historically Important Food):

• Wade into shallow water or work from wetland edge
• Use spade to dig rhizomes from mud
• Harvest only portion of rhizome system–leave sufficient for plant regeneration
• Traditional practice: Peel outer part, use soft interior (iho)
• Modern Note: Harvesting rhizomes significantly disturbs wetland substrate and plant. Consider conservation implications. Historical food use less relevant in modern context given food availability.

Young Shoots (Kōrito):

• Harvest unexpanded shoots emerging from rhizomes in spring
• Cut at base, leave root system intact
• Take sparingly from any one plant colony

Leaves (Construction/Craft):

• Cut mature leaves at base
• Take no more than 30-40% of leaves from any stand
• Harvest from multiple areas rather than depleting one location
• Best harvested in late summer when fully grown
• Leave sufficient foliage for plant photosynthesis and wetland bird habitat

Seed Down/Pappus (Floss):

• Collect in late autumn when seed heads dry and floss is fluffy
• Shake mature female flower spikes into bag
• Traditionally baked to kill insect grubs before use
• Seeds and down naturally disperse–some harvesting does not harm plant

Sustainable Practice:

• Raupo is vigorous and can tolerate moderate harvesting
• However, wetland habitat loss makes all wetland harvesting activities conservation-significant

Best Practice: Grow own raupo in constructed wetland, farm dam, or large water garden for regular harvesting needs

• Wild harvesting should be minimal and from robust, widespread populations only
• Never harvest entire plant stands–leave substantial portions for wildlife habitat

Processing:

• Pollen: Dry thoroughly, sieve to remove chaff, store in airtight container. Use within 12 months
• Rhizomes: Peel immediately after harvest. Can be eaten raw or cooked. Historical use primarily
• Leaves: Dry for construction/craft use OR use fresh for weaving
• Seed down: Traditionally baked to kill grubs before use as stuffing

Parts Used

Medicinal (Limited):

• Seed pappus/floss (down): Applied to wounds, sores, ulcers (Indian traditional medicine, some NZ use)
• Rhizomes: Slightly astringent, antidysenteric, diuretic (Indian traditional use–not prominently documented in NZ rongoā)
• Pollen: Wound healing, astringent (Chinese traditional medicine)

Food (Historically Important in NZ):

• Pollen: Made into bread/cakes called pungapunga (mixed with water, baked–gingerbread-like texture)
• Rhizomes/roots (kōareare, kōreirei, kōuka): Peeled, soft interior (iho) eaten raw or cooked in hāngī
• Young shoots (kōrito, kōrito): Eaten raw or cooked, asparagus-like

Materials/Construction (Primary Traditional Use):

• Leaves: Thatching roofs and walls of whare, canoe sails, kites, fishing floats, mats, weaving
• Stems/stalks: Building frameworks, rafts, woven goods
• Seed down (whara hune, pappus): Bedding, pillow/bolster stuffing, caulking for canoes, poi filling
• Rhizomes: Canoe construction (insets where sections meet), structural components

Constituents & Their Actions

Phytochemical research specific to Typha orientalis is limited compared to research on closely related species T. angustifolia and T. domingensis, which have been studied extensively in Traditional Chinese Medicine and Indian traditional medicine. The following information draws from both limited T. orientalis data and comprehensive research on closely related Typha species, which share similar phytochemical profiles.

Flavonoids and Flavonoid Glycosides:

Flavonoids represent the predominant active constituent class in Typha pollen and to lesser extent in other plant parts. Research on T. angustifolia and T. domingensis has identified over 16 different flavonoid compounds. Key flavonoids include:

• Typhaneoside (major flavonoid in T. angustifolia pollen)
• Isorhamnetin-3-O-neohesperidoside (I3ON)
• Kaempferol and kaempferol glycosides
• Quercetin and quercetin glycosides
• Isorhamnetin derivatives
• Luteolin derivatives
• Various acetylated and glycosylated flavonoid derivatives

The main actions of these flavonoids are:

• Anti-inflammatory effects: Flavonoids inhibit inflammatory pathways including COX and LOX enzymes, which in turn reduces prostaglandin and leukotriene synthesis. They also inhibit NF-κB activation, which in turn downregulates inflammatory cytokine production (TNF-α, IL-1β, IL-6). Studies show significant reduction in carrageenan-induced edema (up to 78% inhibition) and cotton pellet-induced granuloma formation.
• Antioxidant activity: Flavonoids scavenge free radicals (DPPH radical scavenging, reducing power assays), which in turn protects cells from oxidative damage. They reduce malondialdehyde (MDA–marker of lipid peroxidation) and increase superoxide dismutase (SOD) activity, which in turn enhances endogenous antioxidant defenses. These effects protect endothelial cells from LPS-induced oxidative stress.
• Wound healing: Flavonoids promote cell proliferation and migration, which in turn accelerates wound closure. The antioxidant and anti-inflammatory effects create favorable conditions for tissue repair. Traditional use of pollen for wounds aligns with these properties.
• Antiplatelet aggregation: Certain flavonoids inhibit platelet activation and aggregation, which in turn reduces inappropriate clot formation. This supports traditional use for improving microcirculation.
• Analgesic effects: Anti-nociceptive (pain-relieving) constituents identified in T. angustifolia pollen, supporting traditional use for pain conditions.

Steroids and Phytosterols:

Typha species contain various steroids and phytosterols (over 18 identified in T. angustifolia), including:

• β-sitosterol (confirmed in T. angustifolia – known anti-inflammatory)
• Stigmasterol
• Campesterol
• Various steroid glycosides

The main actions of these steroids/phytosterols are:

• Anti-inflammatory properties: β-sitosterol demonstrates well-established anti-inflammatory activity through modulation of inflammatory mediators, which may account for efficacy in inflammatory conditions
• Membrane-stabilising effects: Phytosterols integrate into cell membranes, which in turn influences membrane fluidity and cellular function
• Potential hormonal modulation: Some plant steroids have mild hormone-like effects

Phenylpropanoids and Phenolic Acids:

Typha contains various phenolic compounds (over 9 identified in T. angustifolia), including:

• p-Coumaric acid (significant quantities in T. domingensis – 207.47 μg/g extract)
• Gallic acid (96.25 μg/g extract in T. domingensis)
• Caffeic acid derivatives
• Ferulic acid
• Chlorogenic acid

The main actions of these phenolic compounds are:

• Antioxidant activity: Phenolic acids are potent free radical scavengers, which in turn protects tissues from oxidative damage
• Anti-inflammatory effects: Modulate inflammatory enzymes and signaling pathways
• Antimicrobial properties: Phenolic acids demonstrate activity against various bacteria and fungi

Organic Acids:

Various organic acids identified in Typha species (over 14 in T. angustifolia), contributing to:

• Astringent properties: Organic acids contribute to mild astringent effects relevant to wound healing and antidiarrheal use
• pH modulation: May influence local tissue pH in therapeutic applications

Volatile Oils and Terpenes:

Typha pollen and plant parts contain volatile oil components (over 22 identified in T. angustifolia), including:

• Terpenoids (monoterpenoids, sesquiterpenoids)
• Long-chain hydrocarbons
• Various aromatic compounds

The main actions of volatile components are:

• Antimicrobial activity: Terpenes contribute to antimicrobial effects
• Anti-inflammatory properties: Some terpenoids modulate inflammation

Polysaccharides:

Acidic polysaccharides in Typha pollen have demonstrated:

• Hemostatic activity: Polysaccharides can activate factor XII in blood coagulation cascade, which in turn promotes clotting. This supports traditional use for bleeding
• Immunomodulatory effects: Polysaccharides can modulate immune cell function

Cerebrosides:

Identified in Typha pollen:

• Cellular signaling: Cerebrosides participate in cell membrane structure and signaling
• Potential neuroprotective effects: Some cerebrosides demonstrate biological activity

Carbohydrates/Starch:

Rhizomes are rich in starch (higher carbohydrate content than potatoes), explaining their historical importance as food source.

Other Constituents:

• Proteins and amino acids: Present in various plant parts
• Fiber: Significant in leaves and stems
• Minerals: Various macro and micronutrients

Actions with Mechanisms

Anti-Inflammatory and Analgesic:
Research on Typha species, particularly T. angustifolia pollen, demonstrates significant anti-inflammatory and pain-relieving properties primarily mediated by flavonoid content. Flavonoids inhibit key inflammatory enzymes including cyclooxygenase (COX) and lipoxygenase (LOX), which in turn reduces synthesis of pro-inflammatory prostaglandins and leukotrienes that drive inflammation and pain. The flavonoids also inhibit NF-κB (nuclear factor kappa B), a master regulator of inflammatory gene expression, which in turn downregulates production of inflammatory cytokines (TNF-α, IL-1β, IL-6) simultaneously across multiple pathways. Studies demonstrate dose-dependent inhibition of carrageenan-induced paw edema (up to 78% reduction with aqueous extract, 62% with ethanolic extract) and significant inhibition of cotton pellet-induced granuloma formation (44% inhibition), effects comparable to standard anti-inflammatory drugs. β-sitosterol and other phytosterols contribute additional anti-inflammatory activity through membrane stabilization and modulation of inflammatory mediator production. The combined anti-inflammatory and analgesic effects support traditional use for pain conditions and provide rationale for wound application where reduction of inflammation promotes healing.

Wound Healing and Tissue Repair:
Typha pollen and seed down demonstrate wound healing properties documented in traditional Chinese and Indian medicine and supported by modern research. Flavonoids promote cell proliferation and migration in wound healing models, which in turn accelerates closure of wounds through enhanced tissue regeneration. The antioxidant effects protect healing tissue from oxidative damage that would otherwise impair repair processes, which in turn creates favorable conditions for healthy tissue formation. Anti-inflammatory activity reduces excessive inflammation at wound sites that can cause tissue destruction, which in turn allows proper healing progression without collateral damage. The astringent properties from phenolic compounds and organic acids promote hemostasis (stopping bleeding) and create protective barrier over wounds. Polysaccharides may provide additional wound healing support through immune modulation and activation of healing cascades. Traditional application of seed pappus/down to wounds, sores, and ulcers aligns with these pharmacological properties. The physical properties of the soft, absorbent down also provide practical wound dressing qualities–absorbing exudate while protecting from contamination.

Hemostatic (Blood-Clotting Promotion):
Typha demonstrates bidirectional effects on blood clotting depending on form and processing. Crude pollen contains flavonoids with antiplatelet effects that promote blood circulation and prevent inappropriate clotting, which in turn improves microcirculation. However, processed forms (particularly carbonized/charred pollen used in Traditional Chinese Medicine) develop hemostatic properties that stop bleeding. Acidic polysaccharides in pollen can activate factor XII in the blood coagulation cascade, which in turn initiates clotting processes. The astringent properties from phenolic compounds also contribute to hemostasis by constricting blood vessels and precipitating proteins at bleeding sites, which in turn promotes clot formation. This bidirectional regulation reflects traditional use patterns–crude forms for improving circulation, processed (charred) forms for stopping bleeding. Traditional wound applications (seed down, pollen) provide local hemostatic effects relevant to trauma bleeding.

Antioxidant and Cellular Protection:
Typha constituents, particularly flavonoids and phenolic acids, provide potent antioxidant protection. Flavonoids scavenge reactive oxygen species including DPPH radicals, superoxide, and hydroxyl radicals, which in turn protects cellular components (lipids, proteins, DNA) from oxidative damage. Studies demonstrate strong DPPH radical scavenging activity (IC50 values 39.51-50.85 μg/mL for extracts) and significant reducing power in ferric chloride reduction assays. At cellular level, flavonoids reduce malondialdehyde (MDA–end product of lipid peroxidation, marker of oxidative damage), which in turn indicates protection of cell membranes from oxidative stress. Flavonoids also upregulate endogenous antioxidant enzymes including superoxide dismutase (SOD), which in turn enhances the body’s natural antioxidant defenses. These antioxidant effects protect endothelial cells from lipopolysaccharide (LPS)-induced oxidative stress, which in turn supports vascular health. The comprehensive antioxidant protection explains potential protective effects against chronic diseases associated with oxidative stress and supports wound healing applications where oxidative stress impairs tissue repair.

Antimicrobial:
Typha species demonstrate antimicrobial activity against various bacteria, fungi, and parasites. Flavonoids interfere with microbial cell walls and enzyme systems, which in turn inhibits microbial growth and reproduction. Phenolic acids provide broad-spectrum antimicrobial effects through multiple mechanisms including oxidative damage to microbial cells. Volatile oils and terpenoids contribute additional antimicrobial activity. Specific activities documented include effects against Mycobacterium species (antimycobacterial activity of T. elephantina, T. angustifolia, T. latifolia), supporting traditional use for infections. The antimicrobial properties complement wound healing applications–preventing infection while promoting tissue repair. Traditional use of pollen for wound healing benefits from combined antimicrobial and healing-promoting effects.

Astringent and Antidiarrheal:
Traditional Indian medicine attributes antidysenteric (anti-diarrhoea) and diuretic properties to Typha rhizomes, described as “slightly astringent.” While not prominently featured in New Zealand rongoā Māori, this application appears in traditional systems where Typha grows. The mild astringent properties from phenolic acids and organic acids can reduce intestinal fluid secretion and tone lax tissues, which in turn firms stools and addresses diarrhoea. The anti-inflammatory effects reduce inflammation of intestinal mucosa that drives diarrhoeal symptoms. Antimicrobial properties combat infectious causes of diarrhoea and dysentery.

Diuretic:
Traditional medicine attributes diuretic properties to Typha rhizomes and pollen. While specific mechanisms require research, many flavonoids demonstrate diuretic effects through influences on renal blood flow and electrolyte handling, which in turn increases urine production. This property traditionally applied to urinary tract support and edema reduction.

Immunomodulatory:
Polysaccharides in Typha pollen demonstrate immunosuppressive and immunomodulatory effects documented in traditional Chinese medicine research. These compounds modulate immune cell function and cytokine production, which in turn influences immune responses. The balance between immune activation and suppression depends on dose and specific polysaccharide structures.

Nutritive and Energy-Providing:
Rhizomes are rich in starch (carbohydrate content exceeding potatoes), providing substantial caloric nutrition. This explains historical importance as survival food and staple food source for Māori and Australian Aboriginal peoples. Pollen is also nutritious, containing proteins, carbohydrates, and various micronutrients, explaining use for pollen bread/cakes.

Main Use

Raupo’s primary traditional significance in New Zealand was as an essential material and food resource rather than medicinal plant. The plant’s versatility made it central to Māori daily life, providing materials for shelter, craft, and sustenance. Medicinal applications were limited and secondary.

Primary Traditional Use – Materials and Construction: Raupo was universally used for construction in pre-European New Zealand. Leaves were the traditional material for thatching whare (houses) roofs and walls, providing excellent weatherproofing. Reverend Taylor (1855) documented that raupo was “universally used to cover the framework of their houses.” Many of the first shelters constructed for European settlers in the 19th century were made from raupo, demonstrating its effectiveness. Leaves were also used for temporary and permanent structures including storage buildings. The construction applications extended beyond buildings–leaves made excellent canoe sails (laced with flax fibres), kites, fishing floats, and mats. Bundles of stems created temporary rafts. The dried leaves became material for covering poi, which were then filled with fluffy seed down. In canoe construction, rhizomes (koreirei) were used as insets wherever edges of two sections met.

Food Source (Historically Critical): Raupo provided important nutrition, particularly during specific seasons or food scarcity. The pollen was collected in enormous quantities during mid-summer, mixed with water, and baked into cakes called pungapunga, described as having “gingerbread-like” texture. Taylor (1855) provided detailed descriptions of the collection and preparation process. The rhizomes were a significant food source–the outer part was peeled off, leaving the soft interior (iho), which was eaten both raw and cooked (particularly in hāngī (earth ovens). Best (1902) documented that manuka beetle collected in summer was pounded and mixed with raupo pith (tahuna), packed in baskets, cooked, and eaten. Young unexpanded shoots (kōrito, kōrito) were consumed raw or cooked. The rhizomes were called kōareare by some iwi and described as being “mashed and formed an article of diet.” The carbohydrate-rich rhizomes (higher starch content than potatoes) provided substantial calories, making raupo a valuable survival food.

Weaving and Craft Materials: Stems and leaves were woven into numerous goods: whāriki (mats), kete (baskets), chairs, hats, and tukutuku panels (decorative wall panels). The fibrous leaves provided strong, flexible material for various weaving applications. The plant’s abundance in wetlands made these materials readily available.

Bedding and Soft Goods: The soft floss/down from ripe seed heads (produced in massive abundance) was employed as stuffing for beds, bolsters, pillows, padding in cradles and quilts. Taylor (1855) noted the down was baked before use to kill small grubs that invariably inhabited it. Leaves were strewn around sitting and sleeping places. In Australia, raupo down was sold under the name “Murray Down” for similar stuffing purposes.

Caulking and Waterproofing: The downy pappus (whara hune) was used for caulking and plugging holes in canoes, demonstrating its water-resistant properties when packed into gaps.

Secondary Use – Wound Healing and First Aid: While not a primary medicinal plant in documented New Zealand rongoā Māori, the seed pappus/down was used for wound applications. Indian traditional medicine (documented in related Typha species) uses the pappus as application for sores, wounds, and ulcers. The soft, absorbent nature combined with antimicrobial, anti-inflammatory, and wound-healing properties of constituents makes it suitable for wound dressing. Chinese traditional medicine uses pollen as wound healant and astringent. These applications are supported by modern pharmacological research showing wound-healing, antimicrobial, and anti-inflammatory effects of Typha pollen and constituents. In New Zealand context, raupo down could have served emergency wound dressing function–readily available, soft, absorbent, with inherent healing properties–though this wasn’t a prominent documented use.

Possible Anti-diarrhoeal Use: Indian traditional medicine describes Typha rhizomes as “slightly astringent, antidysenteric, and diuretic.” While not prominently documented in New Zealand traditional use, the rhizomes may have had minor applications for digestive complaints given their mild astringent properties. The broader Polynesian/Pacific context of raupo use may include such applications though documentation is limited.

Modern Application – Water Purification and Phytoremediation: Raupo has gained significant modern importance in constructed wetlands for water treatment. The plant’s rapid growth and massive biomass production enable effective removal of nitrogen and phosphorus from stormwater, sewage, and agricultural effluent (23-95% N removal, 29-92% P removal). This application, while not traditional, represents important ecosystem service and demonstrates raupo’s continued utility.

Cultural and Symbolic Importance: Beyond practical uses, raupo appears in traditional stories and had symbolic significance. In the account of Tawhao (Tainui chief), he constructed a tiny boat of raupo and attached his greenstone eardrop (aurei), sending it with incantations across harbor to his loved one Marutehiakina–a romantic use demonstrating the plant’s cultural presence. Traditional proverbs referenced raupo’s characteristics (leaves rustling in breeze).

Preparations

Seed Pappus/Down (Wound Application):

• Fresh down: Collect dry, fluffy down from mature seed heads (late autumn)
• Traditional treatment: Bake briefly to kill insect grubs, cool completely
• Modern alternative: Ensure down is clean and dry, no baking necessary if harvested from clean environment
• Application: Apply clean, dry down directly to minor wounds, cuts, or abrasions as protective dressing
• Change: Replace daily or when soiled
• Uses: Minor wounds, cuts, abrasions, ulcers (traditional), protective wound covering

Pollen (Theoretical – Based on Chinese Traditional Medicine):

• Collection: Shake mature male flower spikes (mid-summer) over clean container
• Processing: Sieve to remove debris, dry thoroughly if damp
• Storage: Airtight container, cool dark place, use within 12 months
• Application: Theoretically could be dusted onto wounds (Chinese traditional use), though this practice not documented in NZ
• Uses: Wound healing (theoretical based on Chinese medicine), not traditional NZ application

Rhizome (Historical Food, Theoretical Medicine):

• Preparation: Peel outer layer, use soft inner portion (iho)
• Consumption: Can be eaten raw (mild, slightly sweet) or cooked (roasted in coals, steamed in hāngī)
• Theoretical medicinal use: Decoction of rhizome for digestive support (Indian traditional medicine)–not documented NZ use
• Modern Note: Harvesting rhizomes significantly disturbs wetlands. Historical food use, not recommended for modern harvesting given conservation concerns and food availability

Young Shoots (Kōrito) – Food:

• Preparation: Harvest spring shoots, prepare like asparagus
• Consumption: Raw in salads or cooked (boiled, steamed, stir-fried)
• Note: Food use, not medicinal. Sustainable only from cultivated stands

Pollen Cakes (Pungapunga) – Historical Food:

• Collection: Shake male flower spikes when pollen releases freely (mid-summer)
• Preparation: Mix pollen with water to form thick paste/dough
• Baking: Form into cakes, bake until firm (traditionally in hāngī, modern oven ~180°C, 15-20 minutes)
• Taste: Described as “gingerbread-like,” slightly sweet, nutritious
• Note: Historical food preparation, cultural interest rather than medicinal

Dosage

Given raupo’s minimal medicinal use in documented New Zealand traditional medicine, dosage information is limited. The following represents theoretical applications based on traditional use in other cultures and modern research:

Seed Pappus/Down (Topical):

• Apply sufficient clean, dry down to cover wound
• Change dressing daily or when soiled
• Continue until wound heals
• For minor wounds only – seek medical care for serious wounds, deep cuts, or infected wounds

Pollen (Theoretical – Not Traditional NZ Use):

• External: Dust lightly on minor wounds (Chinese traditional practice)
• No established internal dose for New Zealand applications
• Research doses: Studies on T. angustifolia used 125-500 mg/kg in animal models–not directly translatable to human use

Rhizome Decoction (Theoretical – Indian Traditional Medicine):

• No established dose for medicinal use in NZ context
• Food use: Consumed as desired, prepared like vegetable
• Caution: Not recommended for harvest from wild wetlands due to conservation concerns

Duration:

• Topical applications: Use until wound heals (typically days to 2 weeks for minor wounds)
• Any prolonged use or internal use: Consult healthcare provider–raupo not established as internal medicine in NZ traditional practice

Children:

• Topical use of seed down: Safe for minor wounds in children
• Internal use: Not recommended without professional guidance given lack of traditional use data

Safety & Drug Interactions

Scientific Evidence

Phytochemical Characterisation:
Direct phytochemical research on Typha orientalis is extremely limited in scientific litreature. However, extensive research on closely related species T. angustifolia (widely used in Traditional Chinese Medicine) and T. domingensis provides strong evidence for Typha genus phytochemistry. Over 94 compounds identified from T. angustifolia including flavonoids (16 compounds), steroids (18 compounds), phenylpropanoids (9 compounds), organic acids (14 compounds), volatile oils (22 compounds), and other compounds. T. domingensis analysis identified significant quantities of polyphenols including p-coumaric acid (207.47 μg/g), gallic acid (96.25 μg/g), and kaempferol (95.78 μg/g). Given close taxonomic relationship and similar traditional uses across Typha species, T. orientalis likely possesses similar phytochemical profile.

Pharmacological Evidence:

Anti-inflammatory Activity:
Multiple studies demonstrate significant anti-inflammatory effects of Typha pollen extracts:

• Aqueous extract of T. angustifolia pollen (125-500 mg/kg) inhibited carrageenan-induced paw edema by 70-78% at 3-hour mark, comparable to standard drug indomethacin (Kumar et al., 2012)
• 70% methanolic extract showed 53-62% inhibition
• Both extracts significantly inhibited cotton pellet-induced granuloma formation (44% inhibition at 125 mg/kg)
• Effects attributed to flavonoid content, with β-sitosterol confirmed as one active constituent
• Dose-dependent anti-inflammatory effects in acute and chronic inflammation models

Antioxidant Activity:
Research confirms potent antioxidant properties:

• Ethanol extract showed DPPH IC50 of 39.51 ± 0.72 μg/mL
• Water extract showed DPPH IC50 of 50.85 ± 0.74 μg/mL
• Significant ferric reducing activity
• Typhaneoside and isorhamnetin-3-O-neohesperidoside promoted cell proliferation and reduced oxidative stress markers (MDA, NO) in LPS-treated endothelial cells
• Increased superoxide dismutase (SOD) activity, enhancing antioxidant defenses

Wound Healing:
Traditional Chinese Medicine extensively uses Typha pollen for promoting wound healing and improving microcirculation. While specific wound healing studies on T. orientalis are lacking, the established anti-inflammatory, antioxidant, and cell proliferation-promoting effects of Typha flavonoids support wound healing applications.

Hemostatic Activity:
Acidic polysaccharides from Typha pollen activate factor XII in blood coagulation cascade, eliciting hemostatic properties in vitro (Ohkura et al., 2011). Traditional Chinese Medicine uses both crude and processed (carbonized) forms–crude for promoting circulation, carbonized for stopping bleeding, demonstrating bidirectional regulation.

Antimicrobial Activity:
Typha species (T. elephantina, T. angustifolia, T. latifolia) recognized as reservoirs of antimycobacterial agents. Pollen demonstrates antimicrobial activity against various pathogens, supporting traditional wound application (prevents infection while promoting healing).

Safety:
Acute oral toxicity study on T. angustifolia pollen found LD50 > 2,000 mg/kg with no mortality or abnormal behavioral patterns (Kumar et al., 2012), indicating low toxicity. Extensive historical use as food (pollen, rhizomes) across multiple cultures without documented toxicity supports safety.

Traditional Use Documentation:
Extensive documentation exists for raupo’s material and food uses in New Zealand:

• Reverend Richard Taylor (1855, 1870) documented construction, food preparation, and cultural uses in detail
• Elsdon Best (1902, 1925, 1942) extensively documented traditional Māori uses
• T.F. Cheeseman, Thomas Kirk, and other colonial botanists documented uses
• Makereti (1938) described pollen collection and preparation
• Modern ethnobotanical databases (Landcare Research Ngā Rauropi Whakaoranga) compile traditional knowledge

Research Limitations:
No modern clinical trials exist evaluating efficacy for specific medicinal conditions. Phytochemical profiling of T. orientalis specifically is virtually absent from litreature–most research focuses on T. angustifolia (TCM) and T. domingensis. Safety studies in humans lacking. Optimal doses for medicinal applications not established through clinical research. Pharmacological activities demonstrated primarily in vitro and animal models. Medicinal use in NZ rongoā Māori not well-documented compared to material/food uses.

Despite these limitations, the extensive traditional knowledge of material and food uses combined with pharmacological research on closely related species provides foundation for understanding T. orientalis properties and potential applications.

Western Energetics

Temperature: Cooling to Neutral
Raupo demonstrates primarily cooling energetic properties based on constituent profile and traditional applications. The anti-inflammatory effects address hot, inflamed conditions. Astringent properties (mild) indicate cooling and drying effects. Use for wounds suggests cooling action to reduce inflammation and heat. However, the plant is not intensely cooling, falling in the neutral-to-cool range appropriate for inflammatory conditions without being contraindicated in deficiency states.

Moisture: Moderately Drying
Raupo exhibits moderate drying properties through astringent constituents (phenolic acids, organic acids). The drying quality addresses damp, weeping conditions (wounds with excessive discharge, diarrhea with fluid loss). The seed down physically absorbs moisture. However, not as intensely drying as plants with high tannin content. The moderate drying nature makes it suitable for damp conditions while not being so drying as to aggravate dry, atrophic tissues.

Tissue State: Best suited for Heat/Excitation and Damp/Stagnation with Heat

• Heat/Excitation: The cooling, anti-inflammatory properties address hot, inflamed tissue states (inflamed wounds, inflammatory conditions)
• Damp/Stagnation with Heat: The combination of cooling anti-inflammatory effects with moderate drying/astringent properties addresses conditions where dampness and heat co-exist (weeping wounds with inflammation, damp-heat diarrhea)
• Atony with Mild Heat: Mild astringent properties can tone lax tissues while anti-inflammatory effects address heat (mild diarrhoea, lax tissues with inflammation)

Less Suitable For: Very cold conditions, severe deficiency states, or purely dry conditions may not benefit. However, moderate temperature and moisture properties make raupo relatively neutral and versatile.

Taste

Bland/Mild: The rhizomes and young shoots used as food have bland, slightly sweet taste, indicating nutritive rather than strongly medicinal properties. This aligns with primary use as food rather than medicine.

Slightly Astringent: Mild astringent quality from phenolic compounds and organic acids, creating slight drying, puckering sensation. This reflects tissue-toning and mild anti-inflammatory properties.

Absence of Strong Tastes: Raupo lacks the strong bitter, pungent, or intensely aromatic tastes characteristic of primary medicinal plants. This taste profile–mild and bland–clearly indicates a plant whose significance is nutritive and material rather than medicinal.

Plant Lore

Profound Material and Cultural Significance:
Raupo’s importance to Māori culture cannot be overstated–it was fundamental to daily life, providing essential materials for shelter, craft, and food. The plant’s versatility made it invaluable for survival and cultural practices across New Zealand. Its abundance in wetlands (before drainage) made these crucial materials readily accessible to communities throughout the country.

Housing and Shelter:
The universal use of raupo for thatching houses (whare) demonstrates its central importance. Colenso (1881) described skilled Māori artisans building a library and study in his garden using raupo, indicating the plant’s use even in sophisticated construction for European clients who recognized its effectiveness. The fact that “many of the first shelters constructed for European settlers in the 19th century were made from raupō” (Wikipedia) shows the plant bridged cultures–Māori knowledge became essential for early colonial survival.

Romantic and Symbolic Uses:
The story of Tawhao and Marutehiakina beautifully illustrates raupo’s cultural presence beyond practical applications. Tawhao constructed a tiny boat of raupo, attached his precious greenstone eardrop (aurei), and sent it with appropriate incantations across the harbor to his loved one–a gesture combining craftsmanship, spiritual practice, and romantic expression. This demonstrates raupo’s role in emotional and spiritual dimensions of life, not just material provision.

Proverbial Wisdom:
The proverb “Tee whai patootoo a Rauporoa. Long-Bulrush did not strike loudly and repeatedly (so as to be heard)! or, Long-Bulrush gains nothing by his repeated attempts at hitting!” reflected observations of raupo’s natural behavior–the leaf tips always agitated with the least breeze, carried in one direction, invariably keeping the same distance from each other. If they clashed, their striking was not heard and produced no result. This proverb was used for people who returned without achieving their goal, showing how natural observations became wisdom teachings.

Deliberate Introduction to Chatham Islands:
The fact that Māori deliberately naturalised raupo on Chatham Islands (where it wasn’t previously present) demonstrates the plant’s recognised value. This intentional translocation of a resource species shows sophisticated resource management and planning for community needs in new environments.

Historical Abundance and Decline:
Pre-European New Zealand supported vast wetland systems where raupo thrived in enormous stands. The subsequent drainage of approximately 80% of wetlands in 150 years represents catastrophic habitat loss, not just for raupo but for entire ecosystems it supported. This loss fundamentally changed the landscape and resource availability for Māori communities, eliminating ready access to traditional materials.

Human-Associated Plant:
Modern palynological research (pollen analysis from lake sediments) reveals fascinating patterns: at almost every site where raupo is present today, its expansion was promoted to varying extents during periods of human activity. At 87% of sites investigated, raupo showed maximum abundance post-human arrival (Māori settlement ~1000 years ago). This suggests raupo benefited from human-induced environmental changes–forest clearances and associated sediment and nutrient flux into wetlands created ideal conditions for raupo expansion. This in turn provided increased resources, raising intriguing questions about possible deliberate management or cultivation. As both beneficiary of human activity AND provider of resources for expanding populations, raupo may be regarded as a “human associate in Aotearoa New Zealand prehistory”–a plant whose abundance and human populations were mutually reinforcing.

International Parallels:
Related Typha species held similar importance in other cultures. Australian Aboriginal peoples used T. orientalis extensively for food (rhizomes), with the practice documented across the continent. In Australia, raupo down was commercially harvested and sold as “Murray Down” along the Murray River during the early European era. In China, Typha species became important traditional medicines with sophisticated understanding of processing methods (crude vs. carbonised) for different therapeutic effects.

Modern Conservation Recognition:
The dramatic loss of wetland habitat has elevated raupo from common plant to conservation concern–not because raupo itself is threatened, but because wetland ecosystems it characterizes are critically endangered. Wetland restoration efforts now recognize raupo as keystone species for creating wildlife habitat, providing ecosystem services (water purification), and maintaining cultural connections to traditional practices.

Continued Relevance:
Despite massive environmental changes, raupo remains culturally significant for weaving, traditional craft, and as symbol of wetland health. Māori weavers continue using raupo for traditional arts, maintaining connections to ancestral practices and knowledge.

Additional Information

Identification Features:

• Height: Robust perennial herb growing 2-4 metres tall
• Leaves: Long (up to 2 m), strap-shaped, erect, slightly fleshy, 2-3 cm wide, green, growing in clusters on unbranched upright stems
• Leaf bases: Develop long sheaths (often 30+ cm) encircling stems
• Distinctive flower spikes: Cylindrical clusters of tightly packed flowers
• Female flowers: 10-30 cm long, 2-5 cm diameter, brown when mature
• Male flowers: Narrower, shorter cluster above female spike
• Gap: Usually several centimeters between male and female spikes
• Pollen: Copious mustard-yellow pollen from male spike in mid-summer
• Seeds: Tiny with fluffy white down/pappus
• Rhizomes: Thick, creeping underground stems in mud

Similar Species:
T. orientalis (native NZ) can be confused with:

• T. latifolia (found in cultivation): Wider, flat, pale greyish-green leaves; very dark brown to black flower spikes; chromosome number 2n=30 (vs. 2n=60)
• T. domingensis (reported from NZ): Narrower leaves, much narrower inflorescences; chromosome number 2n=30
• Verify identification before harvesting, though all Typha species have similar properties

Wildlife Value:
Raupo wetlands provide critical habitat:

• Fish: Eels, spawning whitebait (inanga), other native fish
• Birds: Fernbird, marsh crakes, bittern (all rare/threatened), waterfowl, tō«Ä«, bellbird
• Invertebrates: Numerous aquatic and wetland-dependent species
• Ecosystem services: Water purification, flood mitigation, carbon sequestration, erosion control

Growing for Resources:
For those interested in traditional crafts, food experimentation, or water purification:

• Constructed wetland: Create dedicated raupo wetland (lined pond, farm dam edge)
• Containment: Surround with 2-metre deep trenches to prevent spread
• Harvest sustainably: from own cultivated stand rather than wild wetlands
• Water quality: Ensure clean water if planning food or medicinal use
• Permits: Check local regulations–some areas restrict planting due to invasive potential

Commercial Availability:

• Live plants: Sometimes available at native nurseries, wetland plant specialists
• Seeds: Occasionally available
• Dried materials: Not commonly commercially available
• Note: Due to invasive potential, some nurseries may not stock

Weaving and Craft:
Raupo weaving remains active tradition:

• Workshops and classes available through Māori cultural organizations
• Traditional techniques passed through generations
• Modern weavers create both traditional and contemporary pieces
• Proper harvesting protocols and cultural respect essential

Modern Water Treatment Applications:
Raupo’s high nutrient uptake capacity makes it valuable for:

• Constructed wetlands treating municipal wastewater
• Farm dairy effluent treatment
• Stormwater quality improvement
• Mining site runoff treatment
• Phytoremediation of contaminated water
• Harvested biomass removes nutrients permanently from system

Storage:

• Pollen: Dry thoroughly, store in airtight container in cool, dark place, use within 12 months
• Seed down: Store dry in breathable container (paper bag) to prevent mold, use within 1-2 years
• Dried leaves: Bundle and hang in dry location, or store flat; use within several years for craft
• Rhizomes: Use fresh; do not store (perishable)

Cultural Learning:
Those interested in raupo’s cultural significance should:

• Attend workshops by Māori cultural practitioners
• Visit museums with traditional Māori taonga (treasures) showing raupo use
• Read ethnobotanical resources by Māori authors
• Support wetland conservation efforts
• Learn traditional weaving from qualified teachers
• Acknowledge Māori as kaitiaki (guardians) of this traditional knowledge

Sources

Herb Federation of New Zealand. (2023). Bullrush Raupo (Typha orientalis). Retrieved from https://herbs.org.nz

Landcare Research. (n.d.). Typha orientalis. Raupō. Ngā Rauropi Whakaoranga: Māori Plant Use Database. Retrieved from https://maoriplantuse.landcareresearch.co.nz

New Zealand Plant Conservation Network. (n.d.). Typha orientalis Fact Sheet. Retrieved from https://www.nzpcn.org.nz

Wikipedia. (2024). Typha orientalis. Retrieved from https://en.wikipedia.org/wiki/Typha_orientalis

Newnham, R., Vandergoes, M., Hendy, C., Lowe, D., & Preusser, F. (2024). Insights into the natural and cultural history of Typha orientalis (Raupō) in Aotearoa New Zealand. PLOS Water, 3(5), e0000240.

Kumar, S., Malhotra, R., & Kumar, D. (2012). Evaluation of anti-inflammatory activity of Typha angustifolia pollen grains extracts in experimental animals. Indian Journal of Pharmacology, 44(6), 788-791.

Liu, J., Chen, Z., Tao, S., Shu, X., Shao, B., Zhang, X., Yang, Y., & Wang, X. (2025). Traditional uses and emerging therapeutic potential of Typha angustifolia L.: insights into its phytochemistry, pharmacological activities and quality control. Frontiers in Pharmacology, 16, 1557136.

Zhang, X., Wang, Y., Dong, H., Xu, Y., & Zhang, S. (2017). Antioxidant capacity of Typha angustifolia extracts and two active flavonoids. Cellular and Molecular Biology, 63(2), 123-128.

Basit, A., Khan, S., Abbasi, M. A., et al. (2023). Phytochemical characterization of Typha domingensis and the assessment of therapeutic potential using in vitro and in vivo biological activities and in silico studies. Scientific Reports, 13, 20265.

Taylor, R. (1855). Te Ika a Maui, or New Zealand and its inhabitants. London: Wertheim & Macintosh.

Taylor, R. (1870). New Zealand and its inhabitants (2nd ed.). London: William Macintosh.

Best, E. (1902). Food products of Tuhoeland. Transactions of the New Zealand Institute, 35, 45-111.

Best, E. (1925). The Maori canoe. Government Printer: Wellington.

Best, E. (1942). Forest lore of the Maori. Polynesian Society: Wellington.

Makereti (M. T. Papakura). (1938). The old-time Maori. Victor Gollancz: London.

Colenso, W. (1868a). On the Maori races of New Zealand. Transactions of the New Zealand Institute, 1, 339-424.

Colenso, W. (1868b). Essay on the Maori, their customs, superstitions, etc. Transactions of the New Zealand Institute, 1, 12-18.

Colenso, W. (1881). Historical incidents and traditions of the olden times, pertaining to the Maoris of the North Island. Transactions of the New Zealand Institute, 14, 3-38.

Brooker, S. G., Cambie, R. C., & Cooper, R. C. (1987). New Zealand medicinal plants (2nd ed.). Heinemann Publishers.

Riley, M. (1994). Māori healing and herbal: New Zealand ethnobotanical sourcebook. Viking Sevenseas NZ Ltd.

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