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Montana Field Guide

Montana Field Guides

Ripgut Brome - Bromus diandrus
Other Names:  Bromus rigidus

Exotic Species (not native to Montana)

Global Rank: G5
State Rank: SNA

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value: 0

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General Description
Stems 40–90 cm. Leaves: sheaths sparsely to densely long-soft-hairy; blades 2–5 mm wide. Inflorescence 8–30 cm, open, drooping. Spikelets strongly compressed with 3 to 9 florets; glumes keeled, glabrous; lower 8–16 mm long, 1-veined; upper 10–18 mm long, 3-veined. Lemma body 20–25 mm long, back rounded, densely silky-hairy, teeth 3–5 mm long, thread-like; awn 14–22 mm, bent, twisted below middle (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Range Comments
Collected in Gallatin and Missoula cos. Introduced throughout most of western and southern N. America (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Habitat
Disturbed sites, partial shade, open understory, edges of buildings, and rocky sites (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

References
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Citation for data on this website:
Ripgut Brome — Bromus diandrus.  Montana Field Guide.  .  Retrieved on , from