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Montana Field Guide

Montana Field Guides

Small Dropseed - Sporobolus neglectus

Species of Concern
Native Species

Global Rank: G5
State Rank: S1S2
(see State Rank Reason below)

Agency Status
MNPS Threat Rank:
C-value: 4

External Links

State Rank Reason (see State Rank above)
Rare in Montana, where it is known from a few widely scattered and poorly documented sites.
General Description
Annual. Stems 10–40 cm. Leaves: blades 1–2 mm wide; throat with a tuft of hairs. Inflorescence a narrow panicle 1–4 cm long, partially enclosed in leaf sheath. Spikelets 2–3 mm long. Lemmas 1.5–2.9 mm long (Lavin in Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Mature fruit in August-September.

Diagnostic Characteristics
Sporobolus vaginiflorus is similar but has glumes greater than 2.5 mm long. It is has been collected only once in MT and was likely adventive. Our other members of this genus are perennials with terminal inflorescences only.

Species Range

Range Comments
Throughout much of North America excepting the Intermountain Region and the very southeast (Lavin in Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Observations in Montana Natural Heritage Program Database
Number of Observations: 4

(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)

Grasslands in the valleys and on the plains; both natural and disturbed habitats are represented in MT.

  • Additional ReferencesLegend:   View Online Publication
    Do you know of a citation we're missing?
    • 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.
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Citation for data on this website:
Small Dropseed — Sporobolus neglectus.  Montana Field Guide.  .  Retrieved on , from