familyPoaceae
subfamilyPoaceae subfam. Panicoideae
genusSetaria
subgenusSetaria subg. Reverchoniae
speciesSetaria reverchonii
subspeciesSetaria reverchonii subsp. firmula
Setaria reverchonii subsp. firmula
Common names: Knotgrass
Synonyms: Setaria firmula Panicum firmulum
Treatment appears in FNA Volume 25. Treatment on page 546.
Sheaths with papillose-based hairs, sometimes nearly glabrous; blades 4-10 cm long, 4-7 mm wide. Spikelets 3-3.2 mm long, subtending bristles 3-6.4 mm. Lower glumes 5-7-veined; upper glumes 5-7-veined. 2n = 36.
Discussion
Setaria reverchonii subsp. firmula is endemic to the sandy prairies of southeastern Texas.
Selected References
None.
Lower Taxa
None.
"decumbent" is not a number.
... more about "Setaria reverchonii subsp. firmula"
absent +
common +
absent +
bulliform +
absent +
membranous +
not penicillate +
absent +
absent +
arising +
single +
membranous +
thick +
petiolate +
folded +
stiff +
adaxial +
scabridulous +
narrowed +
involute +
secund +
appressed +
single +
spikelike +
persistent +
glabrous +
single +
not developed +
absent +
small +
sometimes longer +
Knotgrass +
annual +
climbing +
floating +
decumbent +
erect +
woody +
narrow +
1/2 +
waisted +
large +
hard +
capillary +
germination +
adjacent +
sometimes longer +
well-developed +
absent +
reduced +
bisexual +
absent +
shorter +
shorter or longer +
subtending +
unequal +
membranous +
equal +
papillose-based +
appressed +
stiff +
lacking +
uncinate +
punctate +
Present +
axillary +
elongated +
absent +
distichous +
hyaline +
coriaceous +
absent +
membranous +
free +
absent +
inconspicuous +
glabrous +
cuneate +
fleshy +
staminate +
sterile +
reduced +
5-7-veined +
not saccate +
membranous +
5-7-veined +
absent +
not constricted +
hyaline +
absent +
membranous +
separated +
hyaline +
involute +
absent +
absent +
glabrous +
keeled +
interrupted +
dense +
subterranean +
erect +
spikelike +
slender +
narrow +
absent +
separating +
evident +
scabrous +
knotty +
higher +
open +
closed +
glabrous +
complex +
bisexual +
unisexual +
disposed +
length +
intact +
attached +
falling +
absent +
varying +
simple +
Setaria reverchonii subsp. firmula +
Setaria reverchonii +
subspecies +
hyaline +
membranous +
bisexual +
5-7-veined +
absent +
subequal +
maturity +
rugose +
indurate +
equaling +
rugose +
indurate +
maturity +
absent +
not keeled +
rhizomatous +
perennial +
herbaceous +
various +