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Thurber's Needlegrass - Stipa thurberiana
Other Names:
Achnatherum thurberianum
General Description
Stems 40–70 cm. Leaves: blades 1–2 mm wide, essentially hairless at the throat; ligule 3–6 mm long. Inflorescence a contracted panicle 5–16 cm long. Spikelets 10–15 mm long. Lemmas with appressed hairs, awn 3–5 cm with plumose hairs on the lower portion (Lavin in
Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).
Phenology
Specimen coll. 7/28/43, presumably in flower.
Diagnostic Characteristics
Distinguished from Stipa comata by glumes less than 15 mm long, and conspicuously hairy on lower part of awn. Distinguished from other hairy species of Stipa
by hairs on the awn that are 1 mm long or longer.
Species Range
Montana Range
Range Descriptions
Native
Observations in Montana Natural Heritage Program Database
Number of Observations: 1
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Relative Density
Recency
(Observations spanning multiple months or years are excluded from time charts)
Habitat
Stewardship Responsibility
References
- Literature Cited AboveLegend:
View Online Publication- Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
- Additional ReferencesLegend: View Online Publication
Do you know of a citation we're missing?- Lesica, P., M.T. Lavin, and P.F. Stickney. 2022. Manual of Montana Vascular Plants, Second Edition. Fort Worth, TX: BRIT Press. viii + 779 p.
Quire, R.L. 2013. The sagebrush steppe of Montana and southeastern Idaho shows evidence of high native plant diversity, stability, and resistance to the detrimental effects of nonnative plant species. M.Sc. Thesis. Bozeman, MT: Montana State University. 124 p.
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