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Montana Field Guide

Montana Field Guides

Prairie Dropseed - Sporobolus heterolepis

Status Under Review

Global Rank: G5
State Rank: SU

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

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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).

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

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