Vascular Plants of North Carolina
Account for Yellow Bristlegrass - Setaria pumila   (Poiret) Roemer & Schultes
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Section 5 » Order Cyperales » Family Poaceae
Author(Poiret) Roemer & Schultes
DistributionScattered across the state, with gaps.

Native of Europe; in N.A. throughout the U.S. and southern Canada.
AbundanceUncommon throughout.
HabitatRoadsides, fallow fields, clearings, powerlines, interdune flats.
PhenologyFlowering and fruiting July-October.
IdentificationYellow Bristlegrass stands out due to its dull yellow bristles (vs. pale yellow or whitish in S. parviflora). It is annual, whereas the latter is perennial from knotty rhizomes.
Taxonomic CommentsThe inflorescences of bristlegrasses look like bottlebrushes, due to the numerous bristles that stick out sideways or that angle upward. Two of our 3 native species are annuals; S. parviflora is perennial. When using keys, make sure to have mature fruiting plants and a dissecting scope to see such features as the surface texture on lemmas, number of bristles per spikelet, etc.
Other Common Name(s)Yellow Foxtail
State RankSE
Global RankGNR
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