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Montana Field Guide

Montana Field Guides

Bessey's Locoweed - Oxytropis besseyi


Global Rank: G5
State Rank: S4

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

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General Description
Acaulescent. Herbage silvery strigose with long and short hairs. Leaflets 7 to 21, lanceolate, 5–15 mm long. Stipules membranous, adnate to the petiole, pilose. Inflorescence of 5 to 30 flowers, 8–20 cm high including the peduncle. Flowers magenta, fading to blue; calyx hirsute with white hairs; sepals 2–6 mm long, narrowly lanceolate; banner 15–23 mm long; wings 2-lobed. Legumes ascending, 15–20 mm long, white-villous, inflated, rupturing the persistent calyx (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

In Montana we have varieties besseyi, argophylla (Rydb.) Barneby, fallax Barneby, and ventosa (Greene) Barneby (Kartesz in prep. 2012), although Lesica (2012) only recognizes the first two listed.

Species Range
Present
 


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

Summary of Observations Submitted for Montana
Number of Observations: 29

(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, stony soil of grasslands, steppe, dry woodlands; plains, valleys to subalpine (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

References
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Citation for data on this website:
Bessey's Locoweed — Oxytropis besseyi.  Montana Field Guide.  .  Retrieved on , from