Lupinus arbustus subsp. pseudoparviflorus Douglas ex Lindl. (Rydb.) D. Dunn
Montana lupine (longspur lupine)
Fabaceae (Pea family)
Introduction to Vascular Plants
Montana lupine (longspur lupine)
Fabaceae (Pea family)
Introduction to Vascular Plants
Map
Distribution of Lupinus arbustus subsp. pseudoparviflorus
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Species Information
General:
Perennial herb from a woody stem-base; stems erect to spreading, 20-60 cm tall, several, clumped, simple or somewhat branched, mostly fine silky-hairy.
Leaves:
Basal and alternate along the stem, palmately compound on long stalks (the lower stalks 2-4 times as long as the blades but the upper ones 1/2 as long); leaflets 7 to 11, oblanceolate to narrowly oblong, rounded to sharp-pointed at the tip, 3-6 cm long, equally hairy on both sides or glabrous above.
Flowers:
Inflorescence a terminal raceme of numerous, whorled, pea-like flowers, the racemes 3-12 cm long on stalks 2-8 cm long; corollas blue to violet, sometimes whitish, 8-14 mm long on stalks 3-5 (10) mm long, the banner finely hairy on the central area of the back, the wings glabrous or hairy near the tip, the keel usually fringed with hairs on the upper edges; calyces 2-lipped, the upper lip 2-toothed at the tip and with a short (to 1.5 mm) spur or swelling at the base, the lower lip entire.
Fruits:
Pods, 2-3.5 cm long, 6-9 mm wide, silky or long soft-hairy; seeds 3 to 6, pinkish-brown.
Notes:
Two subspecies are recognized in BC:
1. Leaflets hairy above, sometimes only sparsely so, linear-elliptic to oblanceolate, usually less than 6 mm wide................ ssp. neolaxiflorus Dunn
1. Leaflets hairless or nearly so above, oblanceolate, 6-10 mm wide.................. ssp. pseudoparviflorus (Rydb.) Dunn
Illustration
If more than one illustration is available for a species (e.g., separate illustrations were provided for two subspecies) then links to the separate images will be provided below. Note that individual subspecies or varietal illustrations are not always available.
Illustration Source: The Illustrated Flora of British Columbia
Habitat and Range
Dry meadows, gravelly ridges, rocky slopes, sagebrush-steppe, and open forests in the steppe and lower montane zones (ssp. neolaxiflorus); moist forests in the montane zone (ssp. pseudoparviflorus); both subspecies rare in extreme S BC east of the Coast-Cascade Mountains; S to MT and CA.Synonyms
Synonyms and Alternate Names:
Lupinus laxiflorus var. elmerianus C.P. Sm.
Lupinus laxiflorus var. pseudoparviflorus (Rydb.) C.P. Sm. & H. St. John
Lupinus laxispicatus Rydb.
Lupinus laxispicatus var. whithamii C.P. Sm.
Lupinus mucronulatus var. umatillensis C.P. Sm.
Lupinus scheuberae Rydb.