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Montana Field Guide

Montana Field Guides

Sprangletop - Leptochloa fusca
Other Names:  Leptochloa fascicularis

Status Under Review
Exotic Species (not native to Montana)

Global Rank: G5
State Rank: SNA

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value: 1

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General Description
Warm season annual bunchgrass. Stems 10–40 cm. Leaves: blades 2–4 mm wide, flat and ascending; sheaths with overlapping margins; ligule membranous. Inflorescence a panicle of secund lateral spikes but these often congested in leaf sheaths and adjacent leaf blades. Spikelets 4–7 mm long with 5 to 7 florets; glumes similar in size to lemmas. Lemmas hairy, awn-tipped, distinctly 3-nerved; palea enfolded by floret. Disarticulation above glumes; unit of dispersal the floret (Lavin in Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Our plants are subspecies fascicularis; a recent molecular study supports treatment of this taxon as Diplachne fusca subsp. fasicularis (Peterson et al., 2012; Annals of Botany 109: 1317-1329).

Species Range
Present
 


Range Comments
Throughout nearly all of the U.S. and sporadically across S. Canada (Lavin in Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Summary of Observations Submitted for Montana
Number of Observations: 1

(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
Most frequently in seasonally saturated disturbed areas such as receding margins of reservoirs or muddy roadsides, less frequently along sidewalks or vacant lots.

References
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Citation for data on this website:
Sprangletop — Leptochloa fusca.  Montana Field Guide.  .  Retrieved on , from