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Montana Field Guide

Montana Field Guides

Annual Muhly - Muhlenbergia minutissima

Status Under Review

Global Rank: G5
State Rank: SU

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value: 2

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General Description
Annual bunchgrass. Stems 5–39 cm. Leaves: blades 1–2 mm wide; ligule about 1 mm long. Inflorescence an open panicle 5–15 cm long. Spikelets 1–1.5 mm long. Lemmas unawned to awn-tipped, callus hairs few to absent (Lavin in Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Phenology
Collected July and August.

Diagnostic Characteristics
This is our only annual Muhlenbergia with an open, spreading inflorescence. It could be confused with species of Panicum and Agrostis. A technical key and a hand lens or microscope are needed for positive determination.

Species Range
Present
 


Range Comments
Collected in Gallatin County; sporadic throughout western U.S. (Lavin in Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Summary of Observations Submitted for Montana
Number of Observations: 1

(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
Moist soil along rivers and streams in the valleys.

References
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Citation for data on this website:
Annual Muhly — Muhlenbergia minutissima.  Montana Field Guide.  .  Retrieved on , from