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Montana Field Guide

Montana Field Guides

Bigleaf Lupine - Lupinus polyphyllus

Global Rank: G5
State Rank: SNR

Agency Status
MNPS Threat Rank:
C-value: 6

External Links

General Description
Perennial from a tightly- to loosely-branched caudex. Stems erect, 1–80 cm, glabrate to sericeous. Leaves basal and cauline; lower petioles 6–30 cm long; leaflets 7 to 11, strigose to sericeous beneath, glabrous to sericeous above, 3–10 cm long with acute tips. Racemes solitary, dense, higher than the leaves, 2–25 cm long. Flowers dark blue; calyx tube strigose to sericeous, 1–2 mm long, not spurred; upper lip 3–6 mm long, equal to the lower; banner glabrous, 8–12 mm long, reflexed >50°, usually with a yellow center; wings 9–15 mm long. Legume 10–25 mm long (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Montana plants are varieties burkei (S. Wats.) C.L. Hitchc. and humicola (A. Nels.) Barneby.

Species Range

Range Comments
BC, AB south to CA, NV, UT and NM (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Summary of Observations Submitted for Montana
Number of Observations: 12

(Click on the following maps and charts to see full sized version) Map Help and Descriptions
Relative Density



(Observations spanning multiple months or years are excluded from time charts)

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Citation for data on this website:
Bigleaf Lupine — Lupinus polyphyllus.  Montana Field Guide.  .  Retrieved on , from