Panicum rigidulum subsp. pubescens

(Vasey) Freckmann & Lelong
Synonyms: Panicum longifolium
Treatment appears in FNA Volume 25. Treatment on page 478.

Culms less than 100 cm, usually slender, greatly compressed. Leaves mostly basal; sheaths narrower than those of subspp. elongatum and rigudulum, compressed, often pubescent, at least along the sides near the summit or at the throat; ligules 0.5-3 mm, membranous, usually fimbriate-ciliate; blades usually 2-7 mm wide, often folded or involute, usually pilose adaxially, at least near the base, bases about equal in width to the subtending sheaths. Panicles mostly terminal. Spikelets 2-2.7 mm, green or slightly purplish, set obliquely on the pedicels. Lower glumes about 1/2 as long as the spikelets; upper glumes slightly longer than the lower lemmas, acute; lower lemmas acute, the apices diverging slightly from those of the upper glumes.

Discussion

Panicum rigidulum subsp. pubescens grows primarily in moist pine savannahs, bogs, and other similar open, sandy habitats on the Atlantic and Gulf coastal plains of the United States.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number."thickish" is not a number."varying" is not a number.

puberulent +
acute +, obtuse +, rounded +  and attenuate +
anatomy +  and kranz +
Robert W. Freckmann +  and Michel G. Lelong +
- Vasey Freckmann & Lelong +
1 - ? +  and 3 - ? +
keeled +  and rounded +
divergent +  and parallel +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
membranous +
disarticulating +  and pseudopetiolate +
non-radiate +  and radiate +
8 cm80 mm <br />0.08 m <br /> - 50 cm500 mm <br />0.5 m <br /> +
involute +  and folded +
0.2 cm2 mm <br />0.002 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 /> +
not developed +
terete +  and compressed +
sometimes longer +
fimbriate +
small green +
branched +  and simple +
ascending +  and erect +
compressed +
slender +
0 cm0 mm <br />0 m <br /> - 100 cm1,000 mm <br />1 m <br /> +
woody +  and hard +
Conn. +, N.J. +, N.Y. +, W.Va. +, Del. +, D.C. +, Wis. +, B.C. +, N.S. +, Ont. +, Mass. +, Maine +, N.H. +, R.I. +, Vt. +, Fla. +, Ala. +, Kans. +, Ky. +, La. +, Mo. +, Okla. +, Pa. +, Tenn. +, Tex. +, Va. +, Puerto Rico +, N.C. +, S.C. +, Md. +, Calif. +, Miss. +, Ark. +, Ill. +, Ga. +, Ind. +, Mich. +, Ohio +  and Oreg. +
capillary +
germination +
pistillate +  and staminate +
sometimes longer +
compressed +  and terete +
subtending +
pubescent +  and glabrous +
tuberculate +
unequal +
membranous +
well-developed +
uncinate +
minute +
Oval - ? +  and Round - ? +
bracteate +  and ebracteate +
hollow +  and solid +
coriaceous +
0.05 cm0.5 mm <br />5.0e-4 m <br /> - 0.3 cm3 mm <br />0.003 m <br /> +
membranous +
inconspicuous +
acuminate +, acute +  and truncate +
complex +  and simple +
scabridulous +
concealed +  and prominent +
2 +  and 1 +
subterranean +
1/3 +  and 3/4 +
9 cm90 mm <br />0.09 m <br /> - 40 cm400 mm <br />0.4 m <br /> +
0.05 cm0.5 mm <br />5.0e-4 m <br /> - 0.15 cm1.5 mm <br />0.0015 m <br /> +
dry +  and fleshy +
keeled +  and compressed +
compressed +
in triplets +  and paired +
purplish +  and green +
unisexual +  and bisexual +
lanceolate +
0.2 cm2 mm <br />0.002 m <br /> - 0.27 cm2.7 mm <br />0.0027 m <br /> +
1 +  and 3 +
compound +  and simple +
fused +  and free +
2 +  and 3 +
dome--shaped +  and triangular +
scabridulous +
Panicum longifolium +
Panicum rigidulum subsp. pubescens +
Panicum rigidulum +
subspecies +
membranous +
0.14 cm1.4 mm <br />0.0014 m <br /> - 0.2 cm2 mm <br />0.002 m <br /> +
2/5 +  and 3/4 +
0.06 cm0.6 mm <br />6.0e-4 m <br /> - 0.08 cm0.8 mm <br />8.0e-4 m <br /> +
pubescent +  and glabrous +
rugose +  and verrucose +
chartaceous-indurate +  and rigid +
plant +  and cespitose +
aquatic +  and terrestrial +
dioecious +, monoecious +  and synoecious +