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Montana Field Guide

Montana Field Guides

Indiangrass - Sorghastrum nutans


Global Rank: G5
State Rank: SNR

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

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General Description
Warm season, perennial bunchgrass with short rhizomes. Stems 1–2 m. Leaves: blades 5–10 mm wide, flat and lax to ascending; ligule 2–7 mm long, membranous; sheaths ciliate along margins. Inflorescence a contracted panicle, 15–30 cm long; rachis and pedicels long hairy along margins. Spikelets paired, one sessile the other pedicellate, the sessile seed bearing, 5–8 mm long; the pedicellate mostly absent and represented by only the naked pedicel; glumes straw colored, acute, rounded on back and completely enveloping the florets. Lemmas with a bent awn 10–18 mm long; palea inconspicuous. Disarticulation below the glumes; unit of dispersal the spikelet pair (Lavin in Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Range Comments
Yellowstone Co. and reported from reclamation area in Rosebud Co. (John Rumely, personal communication). Throughout central and eastern N. America (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:
Indiangrass — Sorghastrum nutans.  Montana Field Guide.  .  Retrieved on , from