Steinchisma hians

(Elliott) Nash
Common names: Gaping panicgrass
Synonyms: Panicum bians
Treatment appears in FNA Volume 25. Treatment on page 563.

Culms 20-75 cm, often compressed, at least basally, erect to decumbent, glabrous. Sheaths usually shorter than the internodes, terete or somewhat compressed, glabrous or sometimes sparsely hispid below the throat, margins scarious or sparsely ciliate at the summit; ligules 0.2-0.5 mm, membranous, erose-ciliate; blades 6-20 cm long, 2-5 mm wide, relatively long and slender, flat or folded, glabrous abaxially, mostly glabrous adaxially but sparsely pilose basally. Panicles 5-20 cm, about 1/2 as wide as long, delicate, open; primary branches flexible, spreading or drooping, with short, crowded secondary branches and pedicels. Spikelets 1.8-2.4 mm, often purplish, glabrous. Lower glumes acute; upper glumes and lower lemmas slightly exceeded by the enlarged, indurate, sterile paleas; upper florets 1.6-1.9 mm, dull-colored, minutely papillose, acute. 2n = 18, 20.

Distribution

Va., Miss., Tex., La., Mo., N.Mex., Okla., Ala., Tenn., N.C., S.C., Ark., Ill., Ga., Fla.

Discussion

Steinchisma hians grows in moist or wet, usually open areas, and in moist pinelands, low woods, and ditches. Its range extends from the southeastern United States, through Mexico and Central America to Colombia, Brazil, and Argentina.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

... more about "Steinchisma hians"
anatomy +  and kranz +
Robert W. Freckmann +  and Michel G. Lelong +
(Elliott) Nash +
1 (?) +  and 3 (?) +
keeled +  and rounded +
pseudopetiolate +  and branching +
divergent +  and parallel +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
membranous +
disarticulating +  and pseudopetiolate +
non-radiate +  and radiate +
6 cm60 mm <br />0.06 m <br /> (20 cm200 mm <br />0.2 m <br />) +
pilose +  and glabrous +
folded +  and flat +
slender +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
spikelike +
0 cm0 mm <br />0 m <br /> (1 cm10 mm <br />0.01 m <br />) +
not developed +
terete +  and compressed +
sometimes longer +
Gaping panicgrass +
branched +  and solid +
erect +  and decumbent +
compressed +
slender +
20 cm200 mm <br />0.2 m <br /> (75 cm750 mm <br />0.75 m <br />) +
Va. +, Miss. +, Tex. +, La. +, Mo. +, N.Mex. +, Okla. +, Ala. +, Tenn. +, N.C. +, S.C. +, Ark. +, Ill. +, Ga. +  and Fla. +
capillary +
germination +
pistillate +  and staminate +
sometimes longer +
compressed +  and terete +
shorter or longer +
subtending +
unequal +
membranous +
uncinate +
solid +  and hollow +
cauline +  and basal +
coriaceous +
ciliate +  and erose +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
membranous +
inconspicuous +
1/3 +  and 1/2 +
complex +  and simple +
concealed +  and prominent +
2 +  and 1 +
enlarged +
subterranean +
5 cm50 mm <br />0.05 m <br /> (20 cm200 mm <br />0.2 m <br />) +
0 cm0 mm <br />0 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
dry +  and fleshy +
drooping;spreading +
hispid +  and glabrous +
compressed +  and terete +
in triplets +  and paired +
1 +  and 60 +
unisexual +  and bisexual +
compressed +, lanceolate +  and ellipsoid +
expanding +
0.18 cm1.8 mm <br />0.0018 m <br /> (0.24 cm2.4 mm <br />0.0024 m <br />) +
1 +  and 3 +
fused +  and free +
2 +  and 3 +
dome--shaped +  and triangular +
Panicum bians +
Steinchisma hians +
Steinchisma +
species +
membranous +
0.16 cm1.6 mm <br />0.0016 m <br /> (0.19 cm1.9 mm <br />0.0019 m <br />) +
cartilaginous +, coriaceous +  and indurate +
plant +  and cespitose +
aquatic +  and terrestrial +
dioecious +, monoecious +  and synoecious +