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Montana Field Guide

Montana Field Guides

Macoun Wildrye - x Elyhordeum macounii
Other Names:  Elymus macounii, x Agrohordeum macounii


Global Rank: GNA
State Rank: SNA

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

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General Description
Stems 20–60 cm. Leaves: blades 2–5 mm wide, flat to inrolled. Inflorescence 5–10 cm long, the erect rachis disarticulating at maturity. Spikelets 2 per node (sometimes evident by just 3 glumes at a node), 12–15 mm long; glumes narrow, 1- to 3-veined, tapering to a short to long awn. Lemmas 1 or 2 per spikelet, hairless, tapering to an awn 4–10 mm long (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Diagnostic Characteristics
A hybrid between Elymus trachycaulus and Hordeum jubatum.

Species Range
Present
 


Range Comments
Throughout most of northern and western N. America and absent mostly from eastern U.S (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Summary of Observations Submitted for Montana
Number of Observations: 2

(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
Open dry moderately disturbed sites at lower elevations (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

References
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Citation for data on this website:
Macoun Wildrye — x Elyhordeum macounii.  Montana Field Guide.  .  Retrieved on , from