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Montana Field Guide

Montana Field Guides

Black-grass Rush - Juncus gerardii

Exotic Species (not native to Montana)

Global Rank: G5
State Rank: SNA

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

External Links






 
General Description
Rhizomatous. Stems erect, terete, 10–40 cm. Leaves basal and cauline; blades flat or channeled, ca. 1 mm wide; auricles obscure. Inflorescence open with 10 to 30 pedicellate flowers; main bract smaller than the inflorescence. Flowers with prophylls; tepals green to tan, 2.5–3 mm long, rounded, hood-like, subequal; stamens 6. Capsules ca. 2.5 mm long, truncate on top; seeds without appendages (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Range Comments
Sporadic across northern U.S. and adjacent Canada, Eurasia, possibly introduced in at least part of the N. American range. Known from Madison County (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Habitat

References
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Citation for data on this website:
Black-grass Rush — Juncus gerardii.  Montana Field Guide.  .  Retrieved on , from