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

Lupinus lyallii A. Gray
dwarf mountain lupine
Fabaceae (Pea family)

Introduction to Vascular Plants

© Ward Strong  Email the photographer   (Photo ID #25218)

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Distribution of Lupinus lyallii
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Species Information

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General:
Low perennial herb from a sometimes branched stem-base; stems poorly developed, tufted or mat-forming, less than 10 cm long/tall, finely grey-hairy with short, appressed hairs.
Leaves:
Mostly basal on stalks 4-10 cm long, palmately compound; leaflets 5 to 7, oval to narrowly egg-shaped, 6-15 mm long, 3-5 mm wide, silky on both surfaces.
Flowers:
Inflorescence a dense, terminal raceme, 1-4 cm long, of pea-like flowers; corollas bluish, 7-9 mm long, the banner often darker-blue, oblong-elliptic to narrowly egg-shaped, glabrous and with a white central patch, the wings glabrous, the keel sparsely to densely fringed along the upper edges; calyces 2-lobed, the upper lip 2-toothed, the lower one entire.
Fruits:
Pods, 12-15 mm long, 5 mm wide, silky-hairy; seeds 1 to 4.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Mesic to dry meadows and open, gravelly ridges and slopes in the subalpine and alpine zones; infrequent in the Coast-Cascade Mountains S of 53oN; S to ID, NV and N CA.

Source: The Illustrated Flora of British Columbia

Ecology

Ecological Framework for Lupinus lyallii

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) 1630 2009 2265
Slope Gradient (%) 0 25 80
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
3 201 360
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
0 2 6
Modal Nutrient Regime
Class
B
Number of field plots
 species was recorded in:
48
Modal BEC Zone Class
ESSF
All BEC Zones (# of stations/zone) species was recorded in: AT(7), BAFA(1), ESSF(39), IMA(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 lepidus subsp. lyallii
Lupinus lepidus var. lobbii

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References