Panicum anceps

Michx.
Common names: Beaked panicgrass
Endemic
Treatment appears in FNA Volume 25. Treatment on page 478.

Plants perennial; conspicuously rhizomatous, rhizomes short or elongate, stout, scaly. Culms 30-130 cm, terete to slightly compressed. Sheaths laterally compressed, glabrous or sparsely to densely pilose or villous, especially at the summit; ligules less than 0.5 mm, membranous, erose, often brownish; blades 10-50 cm long, 4-12 mm wide, erect, adaxial surfaces pilose at least basally, glabrous or pilose abaxially. Panicles 10-40 cm, 1/4 - 2/3 as wide as long, well-exserted at anthesis; branches relatively few, stiffly spreading or ascending; ultimate branchlets 1-sided; pedicels 0.1-3 mm, scabridulous to scabrous, appressed. Spikelets 2.3-3.9 mm, narrowly ellipsoid to ovoid, usually subsessile, usually pale to yellowish-green, glabrous, often falcate and gaping at the apices, rarely lanceolate, densely crowded on short, appressed branchlets, set obliquely on short pedicels. Lower glumes A-a as long as the spikelets, 3-veined, keels scabrous, apices acute; upper glumes and lower lemmas subequal, keeled, beaked, usually gaping at the apices; lower florets sterile; lower paleas subequal to the lower lemmas; upper florets 1.5-2.2 mm long, about 1 mm wide, 2/5 – 3/4 as long as the spikelets, apices with a tuft of minute, thick hairs; upper lemmas thick, stiff, clasping the upper paleas throughout their length. 2n = 18, 36.

Distribution

Del., D.C., W.Va., Fla., N.J., Tex., La., Tenn., N.C., S.C., Pa., N.Y., Va., Ala., Ark., Ill., Ga., Ind., Iowa, Md., Kans., Okla., Ohio, Mo., Miss., Ky.

Discussion

Panicum anceps grows in low, moist, primarily sandy areas, pine savannahs, the borders of flood-plain swamps, mesic woodlands, roadsides, and upland pine-hardwood forests. It is restricted to the United States.

Selected References

None.

Key

1 Spikelets 2.7-3.9 mm long, often clearly falcate; rhizomes relatively short and stout Panicum anceps subsp. anceps
1 Spikelets 2.3-2.8 mm long, not clearly falcate; rhizomes relatively long and slender Panicum anceps subsp. rhizomatum

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

... more about "Panicum anceps"
pilose +  and glabrous +
puberulent +
anatomy +  and kranz +
Robert W. Freckmann +  and Michel G. Lelong +
Michx. +
1 (?) +  and 3 (?) +
keeled +  and rounded +
divergent +  and parallel +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
membranous +
disarticulating +  and pseudopetiolate +
non-radiate +  and radiate +
10 cm100 mm <br />0.1 m <br /> (50 cm500 mm <br />0.5 m <br />) +
pubescent +  and glabrous +
filiform +  and ovate flat +
0.4 cm4 mm <br />0.004 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
ascending;spreading +
spikelike +
0 cm0 mm <br />0 m <br /> (1 cm10 mm <br />0.01 m <br />) +
not developed +
terete +  and compressed +
sometimes longer +
Beaked panicgrass +
small green +
branched +  and simple +
ascending +  and erect +
terete +  and slightly compressed +
30 cm300 mm <br />0.3 m <br /> (130 cm1,300 mm <br />1.3 m <br />) +
woody +  and hard +
Del. +, D.C. +, W.Va. +, Fla. +, N.J. +, Tex. +, La. +, Tenn. +, N.C. +, S.C. +, Pa. +, N.Y. +, Va. +, Ala. +, Ark. +, Ill. +, Ga. +, Ind. +, Iowa +, Md. +, Kans. +, Okla. +, Ohio +, Mo. +, Miss. +  and Ky. +
capillary +
germination +
pistillate +  and staminate +
sometimes longer +
compressed +  and terete +
shorter or longer +
subtending +
pubescent +  and glabrous +
tuberculate +
unequal +
membranous +
well-developed +
uncinate +
minute +
Oval (?) +  and Round (?) +
bracteate +  and ebracteate +
hollow +  and solid +
coriaceous +
0 cm0 mm <br />0 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
membranous +
inconspicuous +
1/3 +  and 2/3 +
acuminate +, acute +  and truncate +
complex +  and simple +
concealed +  and prominent +
2 +  and 1 +
subterranean +
well-exserted +
1/4 +  and 2/3 +
10 cm100 mm <br />0.1 m <br /> (40 cm400 mm <br />0.4 m <br />) +
scabridulous +  and scabrous +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
dry +  and fleshy +
glabrous or +  and sparsely densely pilose or villous +
compressed +
gaping +  and subsessile +
usually pale +  and yellowish-green +
unisexual +  and bisexual +
lanceolate +, falcate +, narrowly ellipsoid +  and ovoid +
0.23 cm2.3 mm <br />0.0023 m <br /> (0.39 cm3.9 mm <br />0.0039 m <br />) +
1 +  and 3 +
compound +  and simple +
fused +  and free +
2 +  and 3 +
dome--shaped +  and triangular +
Gramineae +
Panicum anceps +
Panicum sect. Agrostoidea +
species +
membranous +
stipitate +  and sessile +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.22 cm2.2 mm <br />0.0022 m <br />) +
2/5 +  and 3/4 +
1 cm10 mm <br />0.01 m <br /> (?) +
pubescent +  and glabrous +
rugose +  and verrucose +
chartaceous-indurate +  and rigid +
aquatic +  and terrestrial +
dioecious +, monoecious +  and synoecious +