The following Participating Institutions are custodians for this species in the CPC National Collection:
Rae Selling Berry Seed Bank & Plant Conservation Programs
The conservation of Lupinus biddlei is fully sponsored.
Edward Guerrant, Ph.D. contributed to this Plant Profile.
This lupine found in eastern Oregon is a treat for the eyes. Its large, palmately-compound, hairy leaves are a vibrant green. These are set off by a tall spike of white flowers. The seeds, about the size of a lentil or slightly larger, range in color from light peach to a beautiful brick.
Lupinus biddlei seems to be restricted to two distinct locations. Populations are found in two main geographic areas of eastern Oregon, which are separated by approximately 30 miles (50km). No plants are found between the two regions (Nora Taylor, pers. comm.).
Distribution & Occurrence
In the northern part of the range, plants are found on eroded sedimentary soils in and adjacent to draws and on hillsides with mostly southern exposure. In the southern part of the range, plants are found most often on well-drained alluvial soils in flats and bottomlands, occasionally extending up the slopes. Overall, the elevations range from approximately 3450-4450 ft (1050-1360 m). Lupinus biddlei grows in an Artemisia tridentata (big sage) plant community along with Poa sandbergii, Bromus tectorum (cheatgrass), Agropyron cristatum (crested wheatgrass), and Lupinus caudatus. The region is very dry, as it receives less than 15 inches (38 cm) of precipitation per year.
|As of 2001: Two main geographical centers separated by about 30 or 40 miles (48-65 km), each comprised of 3-4 sites, some with multiple populations or sub-populations. Unknown numbers of individuals as little monitoring or inventorying has been done. Populations appear stable (Nora Taylor, pers. comm.). Population sizes in 1989 ranged from 3 individuals to several thousand individuals (Wright 1990).|
Conservation, Ecology & Research
Biddle's lupine begins to emerge in late-April and early-May. In the region that it inhabits, patches of snow may still cover the ground. It blooms, sets seed and drops all its seed by the end of June. The region is susceptible to hard freezes for the duration of the plant's growing season, until the end of June. In particularly cold years, developing pods may freeze thereby killing developing seeds. Lupinus biddlei does not reliably set seed every year for this reason. However, plants appear to be long-lived, and populations appear stable despite sporadic reproductive success (Nora Taylor, pers. comm.).
Lupinus biddlei is able to tolerate moderate disturbances to the surrounding area. Individuals can be found growing along roadsides (Meinke 1982), but they can be destroyed by road grading or clearing if directly damaged.
Burning and subsequent re-seeding with competitive plants (Meinke 1982).
Road grading prior to seed set (Meinke 1982).
Insect damage to flowers and f
Status report compiled in 1990. Historical sites were visited and new sites were located (Wright 1990).
Sites on Bureau of Land Management (BLM) land are grazed at various times during the year. Lupinus biddlei emerges and completes its life cycle so early in the year that it does not seem to be significantly impacted by cattle grazing (Nora Taylor, pers. comm.).
Limited monitoring (Nora Taylor, pers. comm.)
Determine ecological requirements (Meinke 1982)
Clarify taxonomic status. It was listed as a variety of Lupinus polyphilus in Intermountain Flora (1989).
Study reproductive and pollination biology.
Monitor to determine population trends (Wright 1990).
Determine propagation and reintroduction protocols.
Cronquist, A.; Holmgren, N.H.; Holmgren, P.K. 1989. Intermountain Flora, Vascular Plants of the Intermountain West, U.S.A. Bronx, New York: New York Botanical Garden.
Meinke, R.J. 1982. Threatened and Endangered Vascular Plants of Oregon: An Illustrated Guide. Portland, Oregon: U.S. Fish & Wildlife Service, Region 1. 326p.