CPC Plant Profile: DeBeque Milkvetch
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Plant Profile

DeBeque Milkvetch (Astragalus debequaeus)

Description
  • Global Rank: G2 - Imperiled
  • Legal Status: N/A
  • Family: Fabaceae
  • State: CO
  • Nature Serve ID: 151992
  • Date Inducted in National Collection:

Plants are clump-forming perennials 2 to 10 decimeters (8 to 39 inches (in.) in diameter with a woody taproot; stems 14 to 30 centimeters (cm) (5.5 to 12 in.) long, curving upward; compound leaves 2 to 10 cm (0.8 to 4 in.) long with 13 to 21 glabrous, flat or somewhat folded leaflets. Flowers are white, upright, and 17 to 21 millimeters (mm) (0.6 to 0.8 in.) long. Pods are ascending, 15 to 23 mm (0.5 to 1 in.) long, 6 to 11 mm (0.2 to 0.4 in.) thick, and inflated with minute rough hairs that become smooth with age (Welsh 1985, p. 31). Astragalus debequaeus has only been identified as a separate taxonomic entity for about 20 years, which represents about two generations (Colorado Natural Heritage Program (CNHP) 2005, p. 60). The species was discovered and described as a new species in 1984 by Dr. Stanley Welsh of Brigham Young University. Astragalus debequaeus is recognized as a species in the Colorado Rare Plant Field Guide (Spackman et al.1997b, p. 7); Integrated Taxonomic Information System (2007); NatureServe (2006); and Weber and Wittmann (1992, pp. 3, 42; 2001, p. 181).

Participating Institutions
CPC's Plant Sponsorship Program provides long term stewardship of rare plants in our National Collection. We are so grateful for all our donors who have made the Plant Sponsorship Program so successful. We are in the process of acknowledging all our wonderful plant sponsorship donors on our website. This is a work in progress and will be updated regularly.
Updates
  • 08/25/2020
  • Orthodox Seed Banking

Seed storage and collection.

  • 08/25/2020
  • Seed Collection

Seed storage and collection

Nature Serve Biotics
  • 05/02/2017

Known only from the Colorado River Valley near the town of DeBeque, Colorado. There are 16 occurrences. Primary threats include disturbance from oil and gas development, the spread of exotic plant species, trampling by grazing animals, and recreation.

Welsh, Mary VB Goshorn
  • 01/01/2010

Traditional oil and gas development, (2) oil-shale mining, (3)coalbed methane development and/or coal mining, (4) noxious weeds and seeding, (5) existing and projected roads, (6) livestock trampling, (7) off road vehicle (ORV) use, and (8) increased housi

Welsh, Mary VB Goshorn
  • 01/01/2010

The total estimated number of plants at all seventeen occurrences is at least 64,617 (CNHP 2006, p. 2; Lincoln and Bridgman 2006, p.1).

Welsh, Mary VB Goshorn
  • 01/01/2010

Unknown

Welsh, Mary VB Goshorn
  • 01/01/2010

The species is managed as a Sensitive Species by BLM, as designated by the BLM State Director, with special management consideration.

Welsh, Mary VB Goshorn
  • 01/01/2010

Unknown

Welsh, Mary VB Goshorn
  • 01/01/2010

Seed storage and collection

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Photos
Nomenclature
Taxon Astragalus debequaeus
Authority Welsh
Family Fabaceae
CPC Number 395
ITIS 192812
USDA ASDE11
Common Names milkvetch
Associated Scientific Names Astragalus debequaeus | DeBeque milkvetch
Distribution Astragalus debequaeus habitat is found between 1,508 and 1,981 meters (4,970 and 6,500 feet) elevation in Mesa and Garfield Counties, Colorado. The species is known from 17 occurrences that occupy abo
State Rank
State State Rank
Colorado S2
Habitat

Astragalus debequaeus plants are found on the fine-textured, sandy claysoils of the Atwell Gulch Member of the Wasatch Formation that are relativelybarren, varicolored, seleniferous, and saline (Welsh 1985, p. 31).

Ecological Relationships

Unknown

Pollinators
Common Name Name in Text Association Type Source InteractionID
Bees
Bees Not Specified Link
Other
Potter wasps Hornets Not Specified Link
Wasps Not Specified Link
Reintroduction
Lead Institution State Reintroduction Type Year of First Outplanting

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