Search Field Guide
Advanced Search
MT Gov Logo
Montana Field Guide

Montana Field Guides

Prairie Dropseed - Sporobolus heterolepis

Status Under Review
Undetermined Origin

Global Rank: G5
State Rank: SU

Agency Status
MNPS Threat Rank:

External Links

General Description
Perennials 40-95 cm tall. Culms erect, slender, glabrous. Leaf sheaths slightly keeled, glabrous or the lower ones pubescent; ligule 0.1-0.3 mm long, apically fringed; blades 7-31 cm long, 1.4-2.4 mm wide, flat or slightly involute, glabrous to scabrous, somewhat keeled. Panicle 11-22 cm long, usually well exserted, open; primary branches spreading; secondary branches often more or less appressed. Spikelets 1(2)-flowered, greyish. Glumes membranous; lower glume (1.2-)1.8-4.5 mm long, 1-nerved or nerveless; upper glume (2.4-)3.2-6 mm long; lemmas 3.2-4.2 mm long, blunt to acute, 1-nerved; paleas about equal to or longer than lemmas; anthers (1.1-)1.7-3 mm long, dark(adapted from: Sutherland, 1986, Flora of the Great Plains).

Range Comments
MB to NM and TX, east to QC and south (sporadically) to GA, TN and VA; most common in eastern Great Plains and upper Midwest. Known from Crook County, WY and several counties in ND and SD adjacent to or near MT (Kartesz in prep. 2012).

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)

Open woods and upland or lowland prairies (Sutherland, 1986, Flora of the Great Plains).

Login Logout
Citation for data on this website:
Prairie Dropseed — Sporobolus heterolepis.  Montana Field Guide.  .  Retrieved on , from