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Montana Field Guide

Montana Field Guides

Silvery Lupine - Lupinus argenteus


Global Rank: G5
State Rank: S5

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, 10–90 cm, simple or branched above, glabrate to sericeous. Leaves mostly cauline; lower petioles 2–15 cm long; leaflets 5 to 11, strigose to sericeous, sometimes glabrate above, 2–7 cm long with acute tips. Racemes moderately dense, greater than the leaves, 2–15 cm long. Flowers blue; calyx tube 1–3 mm long, flush with the pedicel or distended into a spur <1 mm long; upper lip 1–4 mm long; lower lip slightly longer; banner 4–11 mm long, glabrous or nearly so, reflexed <45°; wings 5–13 mm long. Legume 8–25 mm long (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).


The five varieties occuring in Montana are: argenteus, argentatus (Rydb.) Barneby, depressus (Rydb.) C.L. Hitchc., parviflorus (Nutt. ex Hook. & Arn.) C.L. Hitchc., and rubricaulis (Greene) S.L. Welsh.

Species Range
Present
 


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

Summary of Observations Submitted for Montana
Number of Observations: 49

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

Recency

 

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



Habitat
Grasslands, sagebrush steppe, open forest, woodlands, fellfields; plains, valleys to alpine (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

References
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Citation for data on this website:
Silvery Lupine — Lupinus argenteus.  Montana Field Guide.  .  Retrieved on , from