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Montana Field Guide

Montana Field Guides

American Bird's-foot Trefoil - Lotus unifoliolatus
Other Names:  Lotus purshianus


Global Rank: G5
State Rank: SNR

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

External Links






 
General Description
Taprooted annual. Stems often simple, erect, 5–30 cm. Herbage villous. Leaves nearly sessile, with 3 (1 or 5) narrowly elliptic leaflets, 5–20 mm long. Inflorescence of solitary pedicellate flowers subtended by a leaflet-like bract. Flowers pale yellow; calyx tube ca. 1 mm long; sepals linear, 2–5 mm long; keel 4–8 mm long. Legume 15–35 mm long (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Our plants are variety helleri (Britton) Isley.

Species Range
Present
 


Range Comments
BC to MN, south to CA, TX, AL and Mexico (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Summary of Observations Submitted for Montana
Number of Observations: 8

(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
Sparsely vegetated soil of grasslands, woodlands, roadsides; plains, valleys(Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

References
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Citation for data on this website:
American Bird's-foot Trefoil — Lotus unifoliolatus.  Montana Field Guide.  .  Retrieved on , from