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

Lupinus arcticus subsp. subalpinus S. Watson (Piper & B.L. Rob.) D. Dunn
arctic lupine (subalpine lupine)
Fabaceae (Pea family)

Introduction to Vascular Plants

© Curtis Bjork  Email the photographer   (Photo ID #15769)

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Distribution of Lupinus arcticus subsp. subalpinus
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Species Information

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General:
Perennnial herb from a branched, woody stem-base; stems several, erect to ascending, 20-60 cm tall, with mostly short, appressed to spreading, silky hairs
Leaves:
Most basal on long stalks (in the north) to most along the stem and alternate on short stalks (in the south), palmately compound; leaflets 6 to 10, narrowly oblanceolate to elliptic, pointed to rounded at the tip, 2-9 cm long, 1-1.5 cm wide, glabrous or sparsely hairly above, stiff-hairy below.
Flowers:
Inflorescence a terminal raceme of numerous, more or less whorled pea-like flowers, the racemes 5-15 cm long on stalks 4-8 cm long; corollas blue, rarely whitish to pink, 14-20 mm long, the banner circular and notched at the tip, glabrous, the wings usually glabrous, the keel glabrous or with a few fringing hairs along the upper edges; calyces 2-lipped, the lower lip 5-11 mm long, the upper lip 2-toothed at the tip, 4-8 mm long.
Fruits:
Pods, 2-4 cm long, silky to coarse-hairy; seeds 5 to 8
Notes:
Two subspecies, which intergrade where their ranges overlap, occur in BC.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Moist to mesic meadows, gravel bars, clearing, roadsides, thickets, and open forests in all zones; ssp. arcticus -- common in BC N of 55 N, ssp. subalpinus -- common in BC Sof 55 N, except absent from the Queen Charlotte Islands; ssp. arcticus -- N to AK, YT and NT, ssp. subalpinus -- S to N OR.

Source: The Illustrated Flora of British Columbia

Ecology

Ecological Framework for Lupinus arcticus ssp. subalpinus

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) 1270 1718 2060
Slope Gradient (%) 0 15 52
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
45 164 360
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:
32
Modal BEC Zone Class
ESSF
All BEC Zones (# of stations/zone) species was recorded in: ESSF(29), IDF(1), MS(1)

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 arcticus subsp. canadensis
Lupinus arcticus var. subalpinus (Piper & B.L. Robins.) C.P. Sm.
Lupinus glacialis C.P. Sm.
Lupinus latifolius var. canadensis
Lupinus latifolius var. subalpinus (Piper & B.L. Rob.) C.P. Sm.
Lupinus subalpinus Piper & B.L. Rob.
Lupinus volcanicus Greene
Lupinus volcanicus var. rupestricola C.P. Sm.

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References