E-Flora BC: Electronic Atlas of the Flora of British Columbia

Lupinus argenteus Pursh
silvery lupine
Fabaceae (Pea family)

Introduction to Vascular Plants

© Jim Riley  Email the photographer   (Photo ID #32646)

E-Flora BC Static Map
Distribution of Lupinus argenteus
Click here to view the full interactive map and legend
Details about map content are available here
Click on the map dots to view record details.

SUBTAXA PRESENT IN BC
Lupinus argenteus var. laxiflorus

Species Information

Click on the image below to view an expanded illustration for this species.



General:
Perennial herb from a branching root-crown; stems erect, 40-70 cm tall, several, clustered, branched, covered with short, stiff, appressed or silky hairs, often greyish.
Leaves:
Basal leaves mostly withered or fallen by flowering time; stem leaves alternate, palmately compound, on stalks 2-8 cm long; leaflets 6 to 9, elliptic to linear-lanceolate, often folded, blunt to sharp-pointed at the tip, 2-4.5 cm long, silky or short-stiff-hairy below, glabrous or sparsely stiff-hairy above.
Flowers:
Inflorescence a terminal, slender raceme of numerous, more or less whorled, pea-like flowers; corollas blue to whitish, 8-10 mm long, the banner without a central hairy spot on the back, the wings glabrous, the keel fringed with hairs along the upper edges toward the tip; calyces silky, 2-lipped, the upper lip 2-toothed.
Fruits:
Pods, 1.5-3 cm long, densely silky-hairy; seeds 4 to 6, pinkish-grey to light brown, 4 mm long.

Source: The Illustrated Flora of British Columbia

USDA Species Characteristics

Flower Colour:
Blue
Blooming Period:
Late Summer
Fruit/Seed characteristics:
Colour: Brown
Present from Summer to Fall
Source:  The USDA

Habitat / Range

Dry grasslands, shrublands and forest openings in the steppe and lower montane zones; rare in SC BC, known only from the S Okanagan Valley; E to SK and S to SD, NM and AZ.

Source: The Illustrated Flora of British Columbia

Ecology

Ecological Framework for Lupinus argenteus

The table below shows the species-specific information calculated from
original data (BEC database) provided by the BC Ministry of Forests and Range.
(Updated August, 2013)

Site Information
Value / Class

Minimum

Average

Maximum

Elevation (metres) 370 1151 1660
Slope Gradient (%) 0 22 48
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
65 249 270
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
1 3 6
Modal Nutrient Regime
Class
C
Number of field plots
 species was recorded in:
5
Modal BEC Zone Class
MS
All BEC Zones (# of stations/zone) species was recorded in: BG(1), ESSF(1), IDF(1), MS(2)

Climate

The climate type for this species, as reported in the: "British Columbia plant species codes and selected attributes. Version 6 Database" (Meidinger et al. 2008), is not evaluated, unknown or variable.

Synonyms and Alternate Names

Lupinus allimicranthus C.P. Sm.
Lupinus argenteus subsp. parviflorus (Nutt. ex Hook. & Arn.) L. Phillips
Lupinus argenteus var. moabensis (D. Dunn & Harmon) S.L. Welsh
Lupinus argenteus var. montigenus (A. Heller) Barneby
Lupinus argenteus var. parviflorus (Nutt. ex Hook. & Arn.) C.L. Hitchc.
Lupinus montigenus A. Heller

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References