Vascular Plants of North Carolina
Account for American Barnyard-grass - Echinochloa muricata   (Beauvois) Fernald
Members of Poaceae:
Members of Echinochloa with account distribution info or public map:
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Section 5 » Order Cyperales » Family Poaceae
Author(Beauvois) Fernald
DistributionThroughout the state, except scarce in the outer Coastal Plain and rare in maritime situations.

N.S. to B.C., south to FL and CA.
AbundanceFrequent to common nearly throughout, though apparently rare on the Outer Coastal Plain. Gaps in the Coastal Plain likely will be filled over time.
HabitatRiver shores, sandbars, openings in alluvial forests, impoundments, interdune swales, roadsides.
PhenologyFlowering and fruiting July-October.
IdentificationFrom the familiar, exotic Common Barnyard-grass (E. crusgalli), this native species must be identified with care. It differs in having papillose-based (like pimples) hairs on second glumes and sterile lemmas (vs. hairy or scabrous, but not papillose-based in E. crusgalli). In addition, the fertile lemma has a relatively thick, spiny tip that is persistent (vs. thin and deciduous and set off from the body by a line of tiny hairs in the exotic species).
Taxonomic CommentsIn some older texts, such as RAB (1968), it is lumped within E. crusgalli. The variety microstachya Wiegand is a minor variant that is not recognized here, though it is listed in Weakley (2018).

Other Common Name(s)Rough Barnyard-grass
State RankS4? [S5]
Global RankG5
State Status
US Status
USACE-agcpFACW link
USACE-empFACW link
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B.A. SorrieSame data. RichmondPhoto_natural
B.A. SorrieSandhills Game Land, roadside and roadbed, intermittently flooded, Sept 2014. RichmondPhoto_natural

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