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Polygonum viviparum - L.

Common Name Alpine Bistort
Family Polygonaceae
USDA hardiness 2-6
Known Hazards Although no specific mention has been made for this species, there have been reports that some members of this genus can cause photosensitivity in susceptible people. Many species also contain oxalic acid (the distinctive lemony flavour of sorrel) - whilst not toxic this substance can bind up other minerals making them unavailable to the body and leading to mineral deficiency. Having said that, a number of common foods such as sorrel and rhubarb contain oxalic acid and the leaves of most members of this genus are nutritious and beneficial to eat in moderate quantities. Cooking the leaves will reduce their content of oxalic acid. People with a tendency to rheumatism, arthritis, gout, kidney stones or hyperacidity should take especial caution if including this plant in their diet since it can aggravate their condition[238].
Habitats Mountain grassland and wet rocks[17].
Range Arctic and northern regions of Europe, including Britain, Asia and America. On mountains in south.
Edibility Rating    (3 of 5)
Other Uses    (2 of 5)
Weed Potential No
Medicinal Rating    (1 of 5)
Care (info)
Fully Hardy Moist Soil Semi-shade Full sun
Polygonum viviparum Alpine Bistort


http://commons.wikimedia.org/wiki/User:Slaunger
Polygonum viviparum Alpine Bistort
http://de.wikipedia.org/wiki/Benutzer:Olei

 

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Summary

Alpine bistort is a high-elevation, cold-hardy bistort notable for its vivipary—many lower flowers are replaced by small pear-shaped bulblets. Its leaves are edible like American bistort, and its roots are reputedly less bitter (lower tannins) than B. bistortoides, giving it slightly better potential as a cooked starch. It is a specialist of alpine turf and fellfields. USDA Hardiness Zones 2–6; typical size 10–40 cm tall, 15–30 cm spread.


Physical Characteristics

 icon of manicon of flower
Polygonum viviparum is a PERENNIAL growing to 0.3 m (1ft) by 0.3 m (1ft in).
See above for USDA hardiness. It is hardy to UK zone 3. It is in flower from June to August. The species is hermaphrodite (has both male and female organs) and is pollinated by Insects.
Suitable for: light (sandy), medium (loamy) and heavy (clay) soils. Suitable pH: mildly acid, neutral and basic (mildly alkaline) soils. It can grow in semi-shade (light woodland) or no shade. It prefers moist soil.

UK Hardiness Map US Hardiness Map

Synonyms

Bistorta vivipara. (L.)S.F.Gray.

Plant Habitats

 Meadow; Cultivated Beds;

Edible Uses

Edible Parts: Leaves  Root  Seed
Edible Uses:

A remarkable alpine specialist that offers mild edible greens, marginal but improvable roots, and unique bulblets for both propagation and occasional culinary curiosity—best appreciated where cool, wet alpine conditions can be met. Leaves - raw or cooked[62, 172]. They have a pleasant tart taste when cooked[85]. Seed - raw or cooked[172]. The seed is not often produced and even when it is, it is rather small and fiddly to utilize. It is rich in starch[91]. It is pickled in Nepal[272]. Root - raw or cooked[2, 61, 62, 91]. Starchy and pleasant but rather small[85, 161, 172]. Sweet, nutty and wholesome[183]. They taste best when roasted[183]. Bulbils from lower part of flowering stem - raw[62]. Foraging notes: Edible Uses & Rating: Leaves are mild and usable raw or cooked. Roots are reported in many sources as more acceptable than American bistort—still tannic but less punishing—so potentially serviceable after processing. Seeds are edible but tiny; bulblets are not a staple food but are edible and can be cooked or used as a propagation snack [2-3]. Edibility rating: 3/5 overall (3/5 leaves, 2–3/5 roots with processing, 2/5 seeds/bulblets). Traditional/Indigenous Use Summary: Across circumpolar/alpine cultures, alpine bistort has been noted as a minor green and survival starch, with bulblets occasionally used as a nibble or for quick replanting; the plant’s high-country niche made it a supplemental rather than staple resource. Look-Alikes & Confusion Risks: Easily separated from B. bistortoides by the bulblets on lower inflorescences and generally narrower spikes and smaller stature. Basal leaves could be confused with young Rumex or other Polygonaceae; confirm by checking ocreae and the viviparous spike. Harvest & Processing Workflow: Leaves: harvest young, rinse, and use fresh or briefly blanch. Roots: lift modest plants, peel, thin-slice, and boil through 2–3 water changes; taste and stop when astringency drops to acceptable levels. Bulblets: pick firm, rinse, blanch 1–2 minutes; use immediately or plant for increase. Seeds: shake off, winnow, and simmer as a thickener. Edibility Summary: Best part: young leaves. Usable with processing: roots (less bitter than American bistort), tiny seeds; bulblets edible but minor. Rating: 3/5 overall for foragers in true alpine country. Taste, Processing & Kitchen Notes: Leaf flavor mirrors B. bistortoides—gentle greens with slight mucilage. Roots vary by site but are typically less astringent; peel, slice thin, and boil in repeated changes of water; the goal is to leach tannins while salvaging some starch. Bulblets can be briefly blanched and tossed with other alpine greens; they have little flavor but pleasant bite. Seeds are so small they are best as a soup thickener rather than a grain. Seasonality (Phenology): At true alpine elevations leaves emerge very late spring; flowering begins mid- to late summer with viviparous bulblets forming on the lower spike; seed set follows higher on the spike. Roots can be taken whenever soil is workable; best leaf quality is early. Safety & Cautions (Food Use): Roots still contain tannins; even with lower levels, use moderation and process with multi-stage boiling. As with other Polygonaceae, moderate intake is prudent for people sensitive to astringent compounds.

References   More on Edible Uses

Medicinal Uses

Plants For A Future can not take any responsibility for any adverse effects from the use of plants. Always seek advice from a professional before using a plant medicinally.
Astringent  Styptic

The root is astringent and styptic[172, 240]. It is used in the treatment of abscesses, as a gargle to treat sore throats and spongy gums, and as a lotion for ulcers[240].

References   More on Medicinal Uses

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Other Uses

Ecology & Wildlife: Flowers (and even bulblets) attract tiny alpine pollinators; clumps knit soils on fragile alpine slopes; foliage is minor graze for small mammals. Bulblet production provides a clonal hedge against short seasons.

Special Uses

Food Forest

References   More on Other Uses

Cultivation details

Identification & Habit: A diminutive perennial from a thickened crown and short rhizome. Narrow, erect spikes carry very small white flowers, with many lower florets replaced by pinkish-purple, pear-shaped bulblets (diagnostic). Basal leaves are narrow-lanceolate, shiny, and thick; ocreae papery and brown. Achenes are small and glossy.Succeeds in an ordinary garden soil[1] but prefers a moisture retentive not too fertile soil in sun or part shade[200]. Repays generous treatment[1]. Plants seem to be immune to the predations of rabbits[233]. Plants do not often produce viable seed, reproducing by means of bulbils formed on the lower portion of the flowering stem. For polyculture design as well as the above-ground architecture (form - tree, shrub etc. and size shown above) information on the habit and root pattern is also useful and given here if available. The plant growth habit is a clumper with limited spread [1-2]. The root pattern is rhizomatous with underground stems sending roots and shoots along their length [1-2]. Habitat & Range: A circumpolar/alpine species, in the Southwest restricted to the highest peaks and coldest microsites—alpine meadows, fellfields, and wind-swept ridges with seepage. Size & Landscape Performance:Compact tufts 10–40 cm tall. In rock-garden culture it forms neat clumps if kept evenly moist and cool; excellent for alpine troughs with summer irrigation. Mimic alpine seeps: cool aspect, gritty organic soil, constant moisture, excellent drainage. Mulch with grit, not bark. In hot summers, provide afternoon shade and run a seep line or drip. Remove spent spikes if you do not want self-sown seedlings or bulblet drop-in. Pests & Problems: Heat waves, low humidity, and drought are primary issues; expect leaf scorch below true alpine climates. Generally disease-light; occasional leaf spotting in warm, stagnant air.

References   Carbon Farming Information and Carbon Sequestration Information

Temperature Converter

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Plant Propagation

Seed - sow spring in a cold frame. Germination is usually free and easy. When they are large enough to handle, prick the seedlings out into individual pots and plant them out in the summer if they have reached sufficient size. If not, overwinter them in a cold frame and plant them out the following spring after the last expected frosts. Division in spring or autumn. Very easy, larger divisions can be planted out direct into their permanent positions. We have found that it is better to pot up the smaller divisions and grow them on in light shade in a cold frame until they are well established before planting them out in late spring or early summer.

Other Names

If available other names are mentioned here

Bistorta vivipara (Alpine Bistort)

Native Range

TEMPERATE ASIA: Amur, Armenia, Azerbaijan, China, Ciscaucasia, Dagestan, Eastern Siberia, Gansu Sheng, Georgia, Guizhou Sheng, Habarovskij kraj, Hebei Sheng, Heilongjiang Sheng, Henan Sheng, Hokkaidô, Honshu, Hubei Sheng, Japan, Jilin Sheng, Kamcatskij kraj, Kazakhstan, Korea, Kyrgyzstan, Liaoning Sheng, Magadanskaja oblast, Mongolia, Nei Mongol Zizhiqu, Ningxia Huizi Zizhiqu, Primorye, Qinghai Sheng, Russian Federation, Russian Federation, Russian Federation-Eastern Siberia, Russian Federation-Western Siberia, Sakhalin, Shaanxi Sheng, Shanxi Sheng, Sichuan Sheng, Tajikistan, Western Siberia, Xinjiang Uygur Zizhiqu, Xizang Zizhiqu, Yunnan Sheng,Russian Federation-Ciscaucasia. TROPICAL ASIA: Bhutan, India (north), Nepal, Myanmar, Thailand, NORTHERN AMERICA: Canada, Northwest Territories, Yukon, Québec, Ontario, New Brunswick, Newfoundland and Labrador, Saskatchewan, Alberta, Manitoba, British Columbia, St. Pierre and Miquelon, Greenland, United States, Alaska, Maine, Michigan, New Hampshire, Vermont, Minnesota, South Dakota, Colorado, Idaho, Montana, Oregon, Washington, Wyoming, New Mexico, Arizona, Nevada, Utah, EUROPE: Denmark, Finland, United Kingdom (U.K.), Ireland, Iceland, Norway, Svalbard and Jan Mayen, Sweden, Austria, Switzerland, Germany, Poland, Slovakia, Russian Federation-European part, European part, Albania, Bulgaria, Croatia, Italy, North Macedonia, Montenegro, Romania, Serbia, Slovenia, Spain, France,

Weed Potential

Right plant wrong place. We are currently updating this section. Please note that a plant may be invasive in one area but may not in your area so it's worth checking.

Very low; alpine requirements limit spread. Bulblets can naturalize only in equally cold, moist microsites.

Conservation Status

IUCN Red List of Threatened Plants Status :

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Polygonum molle Perennial2.5 6-9 FLMHSNM212
Polygonum multiflorumHe Shou Wu, Tuber fleeceflowerPerennial Climber4.5 6-9  LMHSNM23 
Polygonum nepalenseNepalese smartweedAnnual0.3 0-0  LMHSNMWe111
Polygonum orientalePrince's Feather, Kiss me over the garden gateAnnual1.5 0-0  LMHSNM220
12

Growth: S = slow M = medium F = fast. Soil: L = light (sandy) M = medium H = heavy (clay). pH: A = acid N = neutral B = basic (alkaline). Shade: F = full shade S = semi-shade N = no shade. Moisture: D = dry M = Moist We = wet Wa = water.

 

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