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Montana Field Guide

Montana Field Guides

Switchgrass - Panicum virgatum

Status Under Review

Global Rank: G5
State Rank: S3S4

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value: 4

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General Description
Perennial bunchgrass with well-developed rhizomes. Stems 60–150 cm. Leaves: blades 2–10 mm wide; sheath essentially hairless; ligule a fringed membrane 3–5 mm long. Inflorescence an open panicle 12–40 cm long. Spikelets 3.5–4 mm long, first glume 3–3.5 mm long, second glume 3.5–4.5 mm long, distally keeled. Lemmas: sterile lemma distally keeled, fertile lemma blunt, light greenish at maturity (Lavin in Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range
Present
 


Range Comments
Throughout much of N. America except for the very western and northern tier of states and provinces (Lavin in Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Summary of Observations Submitted for Montana
Number of Observations: 5

(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
From disturbance-prone settings especially roadsides and similar sites (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:
Switchgrass — Panicum virgatum.  Montana Field Guide.  .  Retrieved on , from