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Montana Field Guide

Montana Field Guides

Lemmon's Alkaligrass - Puccinellia lemmonii

Species of Concern
Native Species

Global Rank: G4
State Rank: S1S2
(see State Rank Reason below)

Agency Status
MNPS Threat Rank: 2
C-value: 7

External Links

State Rank Reason (see State Rank above)
Very rare in Montana where it is known only from Beaverhead County on BLM and State Trust Lands. At least one site is actively grazed, though its susceptibility and response to such activity is uncertain.
General Description
Perennial bunchgrass. Stems 15–30 cm. Leaves: blades 1–2 mm wide, mostly inrolled. Inflorescence a pyramidal panicle 3–17 cm long. Spikelets 4–7 mm long. Lemmas 2.5–4 mm long, with an acute tip (Lavin in Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Fruiting in July-August.

Diagnostic Characteristics
Distinguished from other species of Puccinnellia by the thread-like leaves usually 0.5 mm wide, and the lemma length greater than 2.8 mm.

Species Range

Range Comments
Collected in Beaverhead County; along the western corridor of states within the U.S. (Lavin in Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Observations in Montana Natural Heritage Program Database
Number of Observations: 6

(Click on the following maps and charts to see full sized version) Map Help and Descriptions
Relative Density



(Observations spanning multiple months or years are excluded from time charts)


  • Additional ReferencesLegend:   View Online Publication
    Do you know of a citation we're missing?
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
    • Lesica, P., P. Husby, and S. V. Cooper. 1998. Noteworthy collections: Montana. Madrono 45:328-330.
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Citation for data on this website:
Lemmon's Alkaligrass — Puccinellia lemmonii.  Montana Field Guide.  .  Retrieved on , from