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Montana Field Guide

Montana Field Guides

Long-spur Lupine - Lupinus arbustus
Other Names:  Lupinus laxiflorus


Global Rank: G5
State Rank: SNR

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value:

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General Description
Perennial from a shallow, branched caudex. Stems erect to ascending, 30–70 cm, glabrate to strigillose, little branched. Leaves mainly cauline; basal petioles 8–15 cm long; leaflets 7 to 11, 3–10 cm long with acute to mucronate tips, glabrate to strigose. Racemes loose to moderately dense, higher than the leaves, 6–20 cm long. Flowers blue and yellow; calyx tube 1–2 mm long, distended behind the pedicel into a spur 1–2 mm long; upper lip 2–3 mm long; lower lip slightly longer; banner 8–11 mm long, sparsely pubescent around the upper calyx lobe, reflexed <45°; wings 7–12 mm long, sometimes hairy at the tip. Legume 15–35 mm long (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range
Present
 


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

Summary of Observations Submitted for Montana
Number of Observations: 1

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Relative Density

Recency

 

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



Habitat

References
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Citation for data on this website:
Long-spur Lupine — Lupinus arbustus.  Montana Field Guide.  .  Retrieved on , from