Setaria subg. Paurochaetium

(Hitchc. & Chase) Rominger
Treatment appears in FNA Volume 25. Treatment on page 545.

Plants perennial. Culms tufted, erect. Blades 1-7 mm wide, not plicate. Panicles narrow, usually nodding, more or less interrupted; rachises scabridulous or scabrous, sometimes also sparsely strigose; branches short, appressed; ultimate branchlets with 1-several spikelets in 2 ranks, terminal spikelets subtended by a 1-6 mm bristle. Spikelets 1.5-2.5 mm, glabrous; lower florets usually paleate; upper lemmas and paleas finely and transversely rugose.

Discussion

Setaria subg. Paurochaetium, as treated by Fox and Hatch (1999), includes seven taxa and extends from southern Florida through the West Indies into the Yucatan region of Mexico and Belize. One species, S. chapmanii, grows in the Flora region.

Setaria subg. Paurochaetium usually differs from subg. Reverchoniae in its 2-ranked and smaller spikelets and in the absence of a palea in the lower floret. Unfortunately, S. chapmanii, the only representative of subg. Paurochaetium in the Flora region, is exceptional within the subgenus in lacking a lower palea.

Selected References

None.

Lower Taxa

"decumbent" is not a number.

not penicillate +
anatomy +  and kranz +
James M. Rominger +
(Hitchc. & Chase) Rominger +
1 (?) +  and 3 (?) +
keeled +  and rounded +
pseudopetiolate +  and branching +
divergent +  and parallel +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
membranous +
non-radiate +  and radiate +
usually linear +  and lanceolate occasionally ovate +
0.1 cm1 mm <br />0.001 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
spikelike +
0 cm0 mm <br />0 m <br /> (1 cm10 mm <br />0.01 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
not developed +
compressed +, ellipsoid +  and subglobose +
sometimes longer +
branched +  and solid +
10 cm100 mm <br />0.1 m <br /> (600 cm6,000 mm <br />6 m <br />) +
Conn. +, N.J. +, N.Y. +, Wash. +, Utah +, W.Va. +, Mich. +, Del. +, D.C +, Wis. +, Iowa +, Pacific Islands (Hawaii) +, Md. +, Mass. +, Maine +, N.H. +, R.I. +, Vt. +, Fla. +, Kans. +, N.Dak. +, Nebr. +, N.Mex. +, Okla. +, S.Dak. +, Wyo. +, Puerto Rico +, Calif. +, Oreg. +, Tex. +, La. +, N.C. +, Tenn. +, S.C. +, Ala. +, Virgin Islands +, Pa. +, Mont. +, Miss. +, Ohio +, Va. +, Colo. +, Alaska +, Ark. +, Ariz. +, Ga. +, Idaho +, Ill. +, Ind. +, Ky. +, Minn. +, Mo. +, Nev. +, Alta. +, B.C. +, Man. +, N.B. +, Nfld. and Labr. (Labr.) +, N.S. +, N.W.T. +, Ont. +, P.E.I. +, Que. +, Sask. +  and Yukon +
capillary +
germination +
pistillate +  and staminate +
sometimes longer +
compressed +  and terete +
shorter or longer +
subtending +
unequal +
membranous +
uncinate +
bracteate +  and ebracteate +
solid +  and hollow +
cauline +  and basal +
coriaceous +
membranous +
inconspicuous +
not constricted +
indurate +  and membranous +
rarely exceeding the upper lemmas +  and equaling +
complex +  and simple +
concealed +  and prominent +
2 +  and 1 +
subterranean +
spikelike +
dry +  and fleshy +
scabridulous +
subsessile +  and short pedicellate +
in triplets +  and paired +
1 +  and several +
unisexual +  and bisexual +
turgid +, globose +  and lanceoloid-ellipsoid +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
1 +  and 3 +
fused +  and free +
red +  and white +
fused +  and free +
dome--shaped +  and triangular +
Gramineae +
Setaria subg. Paurochaetium +
subgenus +
membranous +
membranous +  and herbaceous +
not keeled +
reduced +
aquatic +  and terrestrial +
dioecious +, monoecious +  and synoecious +