Setaria pumila
Setaria pumila subsp. pumila
pigeon grass, wood groundsel, yellow bristlegrass, yellow foxtail
setaire glauque, yellow bristlegrass, yellow foxtail
30-130 cm.
glabrous;
ligules ciliate;
blades 4-10 mm wide, loosely twisted, adaxial surfaces with papillose-based hairs basally.
yellowish-green.
3-15 cm, uniformly thick, erect, densely spicate;
rachises hispid;
bristles 4-12, 3-8 mm, antrorsely scabrous.
2-3.4 mm, strongly turgid.
3-3.4 mm.
about 1/3 as long as the spikelets, 3-veined, acute;
upper glumes about 1/2 as long as the spikelets, 5-veined, ovate;
upper florets often staminate;
lower lemmas equaling the upper lemmas;
lower paleas equaling the lower lemmas, broad;
upper lemmas conspicuously exposed, strongly transversely rugose.
yellowish.
= 36, 72.
= 36, 72.
Setaria pumila
Setaria pumila subsp. pumila
Setaria pumila subsp. pumila is a European adventive that has become a common weed in lawns and cultivated fields throughout temperate North America.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
1. Spikelets 3-3.4 mm long; bristles yellow | subsp. pumila |
1. Spikelets 2-2.5 mm long; bristles reddish subsp. pallidefusca | subsp. pallidefusca |
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