Aconitum columbianum

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Aconitum columbianum
Aconitum columbianum 6017.JPG
Aconitum columbianum in Mount Baker-Snoqualmie National Forest
Status TNC G5.svg
Secure  (NatureServe)
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Phylum: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Order: Ranunculales
Family: Ranunculaceae
Genus: Aconitum
Species:
A. columbianum
Binomial name
Aconitum columbianum
Aconitum columbianum distribution.svg
Synonyms

Aconitum geranioides
Aconitum leibergii

Aconitum columbianum is a species of flowering plant in the buttercup family known by the common names Columbian monkshood or western monkshood.

Contents

This wildflower is native to western North America where it grows in riparian and other moist areas, in meadows and coniferous forests. It is found from 600–2,900 metres (2,000–9,500 ft) in elevation. [1]

Description

Aconitum columbianum is a herbaceous perennial that grows from a large tuber-like root with a spindle shape. [2] [3] The stems can be from 20-300 centimeters tall and be either erect or trailing. [4]

Leaves Aconitum columbianum 6023.JPG
Leaves

The leaves that are attached to the stems have as many as 7 deep divisions almost reaching the base of the leaf, but most often 3–5 divisions. There most often be about 2 millimeters of leaf tissue between the stem attachment to the leaf and the deepest point of each leaf division. [4] The edges of each leaf segment are toothed or cleft. [2] Each leaf is 5–15 centimeters wide. [4]

Flowering, Yellowstone National Park Columbian monkshood - Aconitum Columbianum (29916425068).jpg
Flowering, Yellowstone National Park

The flowering stem can either be a single stem without branches and multiple flowers called raceme or a branched panicle. [2] The flowers are most often blue, but can occasionally be white, cream colored, or white with a blush of blue at the margins of the sepals. The flowers are variable in size and can measure from 18–55 mm from the top of the upright "hood" sepal to the tips of the two downward pointing sepals. The two hanging (pendulous) sepals measure 6–16 mm. [4] The prominent hood is varies in shape from being rounded to conical or even more of a crescent shape and measures 10–34 mm from the base where it inserts into the supporting stem to the top of the hood. [4] [2]

Seeds Aconitum columbianum seeds.jpg
Seeds

The fruits are dry pod-like follicles, 10–20 mm long. [2]

Like other monkshoods (Aconitum species), this plant is poisonous to humans and livestock, although some species have been used to make drugs. [5]

Taxonomy

Aconitum columbianum was first scientifically described by Thomas Nuttall in 1838 in A flora of North America by Torrey and Gray. [6] It was described from specimens collected from "springy places on the Oregon, below Wallawallah". [7]

Subspecies

Two subspecies or varieties recognized by Plants of the World Online (POWO) as of 2023: [6]

One other subspecies, Aconitum columbianum ssp. viviparum, is recognized by some botanists or botanical organizations such as Gilkey and Dennis in the Handbook of Northwestern Plants, [2] the USDA Natural Resources Conservation Service PLANTS database (PLANTS), [8] and the Flora of North America (FNA). [9] Aconitum columbianum ssp. viviparum differs from the nominate subspecies, A. columbianum var. columbianum, in having bulbils where the leaf stems meet the main stem of the plant (in the leaf axils) and sometimes in place of flowers. [2] [9]

Range and habitat

Aconitum columbianum grows throughout the western United States, from the west coast through the Rocky Mountains. In addition, it is also found in parts of British Columbia and South Dakota. It is also reported to grow in Iowa, [10] Wisconsin, New York, and the Mexican states of Sonora and Chihuahua. [6]

In 2016, NatureServe evaluated Aconitum columbianum as globally secure (G5). In addition it is evaluated by them as vulnerable at the state level (S3) in Wyoming. [11]

Cultivation

Western monkshood is occasionally grown in gardens for its dramatic dark purple-blue blossoms. It requires a moist and rich soil as well as shade in all but the gentlest of climates. [3]

Related Research Articles

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References

  1. Jepson . accessed 7.23.2013
  2. 1 2 3 4 5 6 7 Gilkey, Helen M.; Dennis, La Rea J (2001). Handbook of Northwestern Plants (3rd ed.). Corvallis, OR: Oregon State University Press. p. 145. ISBN   0-87071-490-2.
  3. 1 2 Barr, Claude A. (1983). Jewels of the plains : wild flowers of the Great Plains grasslands and hills. Minneapolis: University of Minnesota Press. p. 18. ISBN   0-8166-1127-0.
  4. 1 2 3 4 5 Brink, D. E.; Woods, J. A. " Aconitum columbianum - FNA". Flora of North America. Retrieved 5 June 2023.
  5. Whitney, Stephen (1985). Western Forests (The Audubon Society Nature Guides). New York: Knopf. p.  598. ISBN   0-394-73127-1.
  6. 1 2 3 "Aconitum columbianum Nutt". Plants of the World Online . Royal Botanic Gardens, Kew . Retrieved 6 June 2023.
  7. Torrey, John; Gray, Asa (1838). A flora of North America: containing abridged descriptions of all the known indigenous and naturalized plants growing north of Mexico; arranged according to the natural system. New York: Wiley & Putnam. p. 34. Retrieved 6 June 2023.
  8. Aconitum columbianum Nutt. ssp. viviparum (Greene) D.E. Brink, USDA Natural Resources Conservation Service PLANTS Profile, 6 June 2023
  9. 1 2 Brink, D. E.; Woods, J. A. "Aconitum columbianum subsp. viviparum - FNA". Flora of North America. Retrieved 6 June 2023.
  10. Aconitum columbianum Nutt., USDA Natural Resources Conservation Service PLANTS Profile, 6 June 2023
  11. NatureServe (2023). "Aconitum columbianum Columbian Monkshood". NatureServe Explorer. Arlington, Virginia: NatureServe. Retrieved 17 April 2023.