Tall Dropseed - Sporobolus compositus
State Rank Reason (see State Rank above)
Known in Montana from 3 collections; a 1939 collection near Ekalaka, a 1957 collection from Fort Keogh Livestock and Range Laboratory and a 1980 collection from Bighorn County.
Perennial. Stems 30–80 cm. Leaves: blades 2–4 mm wide; throat with a tuft of hairs. Inflorescence a contracted panicle 5–15 cm long, mostly enclosed in leaf sheath. Spikelets 4–6 mm long. Lemmas 3–6 mm long (Lavin in Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX)
Mature fruit in August.
Both S. cryptandrus and S. airoides have spikelets less than 3 mm long and more open inflorescences.
Collected in Carter County; sporadic throughout most of North America (Lavin in Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).
Observations in Montana Natural Heritage Program Database
Number of Observations:
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(Observations spanning multiple months or years are excluded from time charts)
Open forests and grasslands on the plains.
- Additional ReferencesLegend: View Online Publication
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- Brey, C.W. 1998. Epidemiology of wheat curl mite (Aceria tosichella K.) and wheat streak mosaic virus on feral grass species and effect of glyphosate on wheat curl mite dispersal. Ph.D. Dissertation. Bozeman, MT: Montana State University. 136 p.
- Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.