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Montana Field Guide

Montana Field Guides

Long-spine Sandbur - Cenchrus longispinus

Exotic Species (not native to Montana)

Global Rank: G5
State Rank: SNA

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value: 0

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General Description
Warm season, annual bunchgrass. Stems decumbent, 18–60 cm. Leaves: blades 3–6 mm wide, flat and lax; ligule a fringe of hairs 1–2 mm long; sheaths with overlapping margins. Inflorescences a spike of burrs, with each burr enclosing 1 to 3 spikelets (the burrs are derived from fused sterile branches). Spikelets 6–8 mm long, glumes acute, the first 2–3 mm long, the second 4–6 mm long. Lemmas: fertile lemma with acute apices, awnless, hard-textured if fruit-brearing; palea enclosed by lemma. Disarticulation below the glumes; unit of dispersal the burr or cluster of spikelets (Lavin in Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Range Comments
Throughout nearly all of the U.S. and sporadically in southern Canada (Lavin in Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Habitat

References
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Citation for data on this website:
Long-spine Sandbur — Cenchrus longispinus.  Montana Field Guide.  .  Retrieved on , from