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Montana Field Guide

Montana Field Guides

Weak Mannagrass - Torreyochloa pallida
Other Names:  Glyceria pauciflora, Puccinellia pauciflora, Puccinellia pallida var. pauciflora


Global Rank: G5
State Rank: S4

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value: 7

External Links






 
General Description
Cool season, rhizomatous, perennial aquatic. Stems 40–70 cm. Leaves: blades 1–3 mm wide, mostly flat and lax to ascending; sheaths with overlapping margins; ligule membranous. Inflorescence an open panicle 6–12 cm long. Spikelets 4–7 mm long, with 4 to 7 florets; glumes similar to lemmas. Lemmas hairless or scabrous with a blunt tip, rounded on back and with prominent parallel venation; palea well developed. Disarticulation above glumes; unit of dispersal the floret (Lavin in Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Range Comments
Throughout western N. America (Lavin in Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Habitat
Alkaline and fresh water aquatic, often at higher elevations, primarily in western MT. (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:
Weak Mannagrass — Torreyochloa pallida.  Montana Field Guide.  .  Retrieved on , from