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Montana Field Guide

Montana Field Guides

Richardson's Needlegrass - Stipa richardsonii
Other Names:  Achnatherum richardsonii


Global Rank: G5
State Rank: S4

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

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General Description
Stems 40–80 cm. Leaves: blades 1–2 mm wide, scabrous near the throat, ligule <0.5 mm. Inflorescence an open panicle 10–15 cm long. Spikelets 7–8 mm long, pendant. Lemmas appressed hairy, with an awn 1.5–3 cm long (Lavin in Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range
Present
 


Range Comments
Throughout the northern Rocky Mountain region (Lavin in Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Summary of Observations Submitted for Montana
Number of Observations: 84

(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
Open dry settings and open montane understory, including mountain big sagebrush steppe (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:
Richardson's Needlegrass — Stipa richardsonii.  Montana Field Guide.  .  Retrieved on , from