Hedysarum alpinum

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Hedysarum alpinum
Hedysarum alpinum.png
Scientific classification Red Pencil Icon.png
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Fabales
Family: Fabaceae
Genus: Hedysarum
Species:
H. alpinum
Binomial name
Hedysarum alpinum
L.

Hedysarum alpinum is a species of flowering plant in the legume family known by the common name alpine sweetvetch. It is called masu in the Iñupiaq language. It has a circumpolar distribution, occurring throughout the northern latitudes of the Northern Hemisphere. In North America it is widespread in Canada and the northernmost United States, including Alaska. [1]

Contents

Description

Hedysarum alpinum flower Hedysarum alpinum (7833274266).jpg
Hedysarum alpinum flower

This plant is a perennial herb producing several erect stems from its caudex. It grows to 70 centimetres (28 inches) in height. The taproot is thick and woody, and it has rhizomes which can produce new stems. The leaves are each divided into a number of leaflets up to 3.5 centimetres (1.4 inches) long. The inflorescence is a dense raceme of flowers. [1] The flowers are pink or pale purple and up to 1.5 centimetres (0.59 inches) long. [2] The flowers are pollinated by insects such as the bumblebee and honeybee. The fruit is a flat legume pod which is narrowed between the seeds, with as many as 9 segments. [1]

Distribution and habitat

This plant generally grows in the boreal and northern temperate climates. It occurs in tundra and taiga habitat types, in floodplains, grasslands, and dry forests. It is well adapted to calcareous soils. It is usually not a dominant species but it is considered dominant in several river deltas and plains in Alaska. It is a pioneer species on floodplains that have been recently scoured by water and ice. It grows with willows and birches along waterways and in forests dominated by spruces. It grows on grasslands with grass species such as little bluestem (Schizachyrium scoparium), Canada bluegrass (Poa compressa), and American dunegrass (Leymus mollis). [1]

Ecology

Alpine sweetvetch is an important source of food for many types of animals, including black bears, grizzly bears, American bison, moose, Dall's sheep, and caribou. Bears are adept at digging up the nutritious roots. The roots are a primary food for grizzly bears in some areas, such as Banff National Park. In parts of Alaska this plant is a primary food for Dall's sheep and caribou. Many small mammals, such as voles and short-tailed weasels eat it, and a variety of birds nest in alpine sweetvetch habitat. [1]

Use by humans

Native Alaskan peoples used and still use the plant for food, particularly the fleshy roots. [1] The roots are said to taste like young carrots. [2] The Inupiat people call the plant wild potato and obtain dietary fiber from the roots. Alpine sweetvetch is the most important food source for the Dena'ina people after wild fruit species. [1] The Eskimo train dogs to locate stores of roots that have been cached by mice. [2] [3] The roots may be eaten raw or prepared in a number of ways, including boiling, roasting, and frying in grease. They are stored in lard or oil and eaten when other food stores run out. [1] The seeds should not be eaten raw, or in large quantity, as they contain L-canavanine, which may have led or contributed to the death of Christopher McCandless. [4] Research into the veracity of this theory is ongoing. [5] [6]

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References

  1. 1 2 3 4 5 6 7 8 Gucker, Corey L. 2007. Hedysarum alpinum. In: Fire Effects Information System, [Online]. U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, Fire Sciences Laboratory. Retrieved 11-22-2011.
  2. 1 2 3 S.G. Aiken, et al. 1999 onwards. Hedysarum alpinum var. alpinum. Flora of the Canadian Arctic Archipelago: Descriptions, Illustrations, Identification, and Information Retrieval. Version: 29 April 2003. Retrieved 11-22-2011.
  3. Hedysarum alpinum. Native American Ethnobotany Database. Retrieved 2016-12-10.
  4. Jon Krakauer (11 February 2015). "How Chris McCandless Died: An Update". The New Yorker Blog: Page-Turner.
  5. "Krakauer's wild theory on McCandless gives short shrift to science". Anchorage Daily News. 18 September 2013.
  6. Treadwell, Edward M.; Clausen, Thomas P. (2008). "Is Hedysarum mackenziei (Wild Sweet Pea) Actually Toxic?". Ethnobotany Research & Applications. 6: 319–321. doi: 10.17348/era.6.0.319-321 .