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

Lupinus densiflorus Benth. var. densiflorus
dense-flowered lupine (whitewhorl lupine)
Fabaceae (Pea family)

Introduction to Vascular Plants
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Distribution of Lupinus densiflorus var. densiflorus
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Species Information

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Annual herb from a taproot; stems erect to spreading, 20-30 cm tall, hollow-cylindric at the base, branched, abundantly soft-spreading-hairy.
Basal and alternate along the stem but tending to be clustered toward the top of the stem, palmately compound, the leaf stalks very hairy and several times as long as the leaf blades; leaflets 8 to 10, elliptic-oblanceolate, sharp-pointed to blunt at the tip, 1.5-3 cm long, glabrous above, soft-spreading-hairy below.
Inflorescence a stalked, terminal raceme of whorled pea-like flowers; corollas white to yellowish white, often tinged with pink, 1-1.5 cm long, the banner oblong, short-hairy on central groove, the wings and the keel fringed on the edges towards the base; calyces 2-lipped, the upper lip short, 2-lobed, the lower lip much longer, 3-toothed; all flower parts persistent as dried membranes around the pod.
Pods, 1.5-2 cm long, egg-diamond-shaped, stiff-hairy; seeds 2, brownish, 4-6 mm long.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Dry to moist, grassy openings in the lowland zone; rare on SE Vancouver Island, known only from the Victoria area; S to NW WA.

Source: The Illustrated Flora of British Columbia


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 densiflorus var. latilabris C.P. Sm.
Lupinus densiflorus var. scopulorum C.P. Sm.
Lupinus densiflorus var. stenopetalus C.P. Sm.
Lupinus densiflorus var. tracyi C.P. Sm.
Lupinus microcarpus subsp. scopulorum (C.P. Sm.) C.P. Sm.
Lupinus microcarpus var. densiflorus (Benth.) Jeps.
Lupinus microcarpus var. scopulorum

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References