Setaria adhaerans
Setaria reverchonii
bur bristlegrass, tropical barbed bristlegrass
Reverchon's bristlegrass
25-60 cm.
30-90 cm;
nodes glabrous, strigose, or with appressed hairs.
glabrous throughout;
ligules 1-2 mm, of hairs, white;
blades usually less than 10 cm long, 5-10 mm wide, flat, broad basally, abaxial surfaces conspicuously strigose with papillose-based hairs, tapering abruptly at the apices;
bristles solitary, about 5 mm, retrorsely scabrous.
with papillose-based hairs, sometimes nearly glabrous, margins ciliate distally;
ligules 1-2 mm, of stiff hairs;
blades 4-30 cm long, 1-7 mm wide, involute, stiff, scabridulous and narrowed basally.
2-6 cm, verticillate, green to purple;
rachises retrorsely rough hispid.
5-20 cm, erect, slender, interrupted;
rachises scabrous;
bristles 2-8 mm.
1.5-2.2 mm.
2.1-4.5 mm, elliptic to obovate, randomly distributed on the branch axes.
about 1/2 as long as the spikelets, obtuse, 1(3)-veined;
upper glumes nearly as long as the spikelets, 5-7-veined;
lower lemmas equaling to slightly exceeding the upper lemmas;
lower paleas less than 1/2 as long as the spikelets, scalelike;
upper lemmas finely and transversely rugose;
upper paleas similar to the upper lemmas.
1/2 as long as the spikelets, 5-7-veined;
upper glumes equaling the upper lemmas, 7-9-veined;
lower lemmas equaling the upper lemmas;
lower paleas absent;
upper lemmas indurate, finely and transversely rugose;
upper paleas similar to the upper lemmas.
= 18.
Setaria adhaerans
Setaria reverchonii
Setaria adhaerans grows in subtropical regions throughout the world. In North America, it is known from the southern United States, northeastern Mexico, Guatemala, Cuba, and the Bahamas. The Californian record may represent a recent introduction.
Setaria adhaerans resembles the temperate S. verticillata, but differs in having shorter panicles, shorter spikelets, glabrous sheath margins, and papillose-based strigose hairs on the blades.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Setaria reverchonii grows in sandy prairies and limestone hills from eastern New Mexico, southwestern Oklahoma, and Texas to northern Mexico.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
1. Blades usually more than 15 cm long; spikelets 3.5-4.5 mm long | subsp. reverchonii |
1. Blades usually less than 15 cm long; spikelets 2.1-3.2 mm long. | → 2 |
2. Blades 2-4 mm wide; spikelets about 2.5 mm long | subsp. ramiseta |
2. Blades 4-7 mm wide; spikelets about 3-3.2 mm long | subsp. firmula |
WildflowerSearch
iNaturalist
USDA Plants Database
