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Montana Field Guide

Montana Field Guides

Small-flower Sand-verbena - Tripterocalyx micranthus
Other Names:  Abronia micrantha

Status Under Review

Global Rank: G5
State Rank: SU

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

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General Description
Annual herbs. Stems glandular-pubescent, trailing to ascending, 5–20 cm long. Leaf blades ovate, 15–40 mm long, glabrous with ciliate margins. Inflorescence axillary, pedunculate clusters subtended by 5 separate, ovate involucral bracts 4–6 mm long. Flowers with a white, corolla-like, tubular calyx, ca.10 mm long with 5 flaring, bilobed lobes; stamens 5, included; style included; stigma linear. Fruit ellipsoid, scabrous, 1–2 cm long; the achene completely surrounded by the 3 membranous, veiny wings (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Range Comments
In MT from the Yellowstone region sporadically east to Valley and Custer counties (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX); ND, WY, UT, CO, NV, AZ, NM, TX, KS (S1), NE (S1), and AB.

Habitat
Sandy soil of grasslands, river terraces; 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:
Small-flower Sand-verbena — Tripterocalyx micranthus.  Montana Field Guide.  .  Retrieved on , from