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Montana Field Guide

Montana Field Guides

Dense Silky Bentgrass - Apera interrupta
Other Names:  Agrostis interrupta

Exotic Species (not native to Montana)

Global Rank: GNR
State Rank: SNA

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value: 1

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General Description
Cool season, annual bunchgrass. Stems few-bunched, 15–40 cm. Leaves: blades 0.5–1 mm wide, flat and ascending; sheaths with overlapping margins; ligule membranous. Inflorescence a contracted panicle 2–8 cm long. Spikelets with one floret 1.7–2 mm long; glume with a scabrous midvein. Lemmas 1.5–1.9 mm long, awned from the upper two-thirds with a slender awn 5–9 mm long; palea about as long as the lemma (Lavin in Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Range Comments
Sporadic but introduced throughout N. America except in the central tier of provinces and states and in the southeast (Lavin in Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Habitat
Disturbed moist settings including depressions where water collects and lake margins at moderate elevations (Lavin in Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

References
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Citation for data on this website:
Dense Silky Bentgrass — Apera interrupta.  Montana Field Guide.  .  Retrieved on , from