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Montana Field Guide

Montana Field Guides

Woolgrass - Scirpus cyperinus


Global Rank: G5
State Rank: S3

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

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General Description
Caespitose. Stems 80–120 cm, clustered on short rhizomes. Leaves: blades 2–6 mm wide; basal sheaths brown. Inflorescence open-cymose with spikelets clustered at tips of short or long peduncles. Spikelets 3–5 mm long. Scales ca. 1.5 mm long, brown; tip rounded to acute. Flowers: bristles 6, contorted, smooth, white, longer than the scales; stigmas 3. Achene 2- or 3-sided, whitish, 0.5–1 mm long (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Range Comments
MB to NS south to TX, AL, FL, Mexico, disjunct and perhaps introduced in WA, OR, and Sanders County, MT (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Habitat

References
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Citation for data on this website:
Woolgrass — Scirpus cyperinus.  Montana Field Guide.  .  Retrieved on , from