Panicum capillarioides

Vasey
Common names: Long-beaked witchgrass
Treatment appears in FNA Volume 25. Treatment on page 464.

Plants perennial; cespitose from a knotty crown, hirsute, hairs papillose-based or glabrous. Culms 30-75 cm tall, 1-2 mm thick, terete to slightly compressed, erect or ascending, stiff, often bent at the nodes, simple or sparingly branched; nodes densely pubescent. Sheaths shorter than or equaling the internodes, rounded, hirsute, green or tinged with purple, margins ciliate; ligules 0.5-1 mm; blades 12-30 cm long, 2-12 mm wide, stiffly erect or ascending, flat, pubescent, sometimes sparsely so, hairs papillose-based, bases truncate, apices attenuate. Panicles terminal, 15-30 cm long, 10-12 (26) cm wide, usually shortly exserted, scarcely overtopping the blades; rachises hispid, some¬times glabrous basally; primary branches alternate or opposite, divergent, secondary branches divergent, most abundant on the distal 1/3 of the primary branches, with 1-3 spikelets; pedicels 2-20 mm, confined to the distal 1/3 of the branches; pulvini poorly developed, shortly pilose. Spikelets 5-6.5 mm long, 1-1.2 mm wide, glabrous, long-acuminate. Lower glumes 2-3 mm, about 1/2 as long as the spikelets, attached about 0.4 mm below the upper glumes, 5-7-veined, acute to obtuse; upper glumes and lower lemmas 5-6 mm, exceeding the upper florets by 3-4 mm, 9-13-veined; lower florets sterile; lower paleas 1.5-2 mm, acute; upper florets 1.6-2 mm long, 1-1.1 mm wide, smooth, chestnut-brown when mature. 2n = 36.

Distribution

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Tex.

Discussion

Panicum capillarioides grows in sandy grasslands, oak savannahs, and rangelands from southern Texas to northern Mexico.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number."-11-veined" is not declared as a valid unit of measurement for this property.

... more about "Panicum capillarioides"
puberulent +
attenuate +
anatomy +  and kranz +
Robert W. Freckmann +  and Michel G. Lelong +
1 - ? +  and 3 - ? +
keeled +  and rounded +
divergent +  and parallel +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
membranous +
disarticulating +  and pseudopetiolate +
non-radiate +  and radiate +
12 cm120 mm <br />0.12 m <br /> - 30 cm300 mm <br />0.3 m <br /> +
filiform +  and ovate flat +
0.2 cm2 mm <br />0.002 m <br /> - 1.2 cm12 mm <br />0.012 m <br /> +
spikelike +
0 cm0 mm <br />0 m <br /> - 1 cm10 mm <br />0.01 m <br /> +
not developed +
terete +  and compressed +
thick-walled +
sometimes longer +
Long-beaked witchgrass +
small green +
branched +  and simple +
30 cm300 mm <br />0.3 m <br /> - 75 cm750 mm <br />0.75 m <br /> +
ascending +  and erect +
bent +, terete +  and slightly compressed +
2 cm20 mm <br />0.02 m <br /> - 300 cm3,000 mm <br />3 m <br /> +
woody +  and not succulent +
0.1 cm1 mm <br />0.001 m <br /> - 0.2 cm2 mm <br />0.002 m <br /> +
capillary +
germination +
pistillate +  and staminate +
sometimes longer +
compressed +  and terete +
shorter or longer +
subtending +
pubescent +  and glabrous +
tuberculate +
unequal +
membranous +
well-developed +
papillose-based +
uncinate +
Oval - ? +  and Round - ? +
bracteate +  and ebracteate +
hollow +  and solid +
coriaceous +
0.05 cm0.5 mm <br />5.0e-4 m <br /> - 0.1 cm1 mm <br />0.001 m <br /> +
membranous +
inconspicuous +
acute +  and obtuse +
0.4 cm4 mm <br />0.004 m <br /> - 0.2 cm2 mm <br />0.002 m <br /> +
0.15 cm1.5 mm <br />0.0015 m <br /> - 0.2 cm2 mm <br />0.002 m <br /> +
complex +  and simple +
concealed +  and prominent +
2 +  and 1 +
15cm +  and 30cm +
subterranean +
pyramidal +
10 cm100 mm <br />0.1 m <br /> - 12 cm120 mm <br />0.12 m <br /> +
simple +  and compound +
0.2 cm2 mm <br />0.002 m <br /> - 2 cm20 mm <br />0.02 m <br /> +
dry +  and fleshy +
divergent +, opposite +  and alternate +
glabrous +  and hispid +
in triplets +  and paired +
0.5 cm5 mm <br />0.005 m <br /> - 0.65 cm6.5 mm <br />0.0065 m <br /> +
unisexual +  and bisexual +
long-acuminate +
0.1 cm1 mm <br />0.001 m <br /> - 0.8 cm8 mm <br />0.008 m <br /> +
1mm +  and 1.2mm +
1 +  and 3 +
compound +  and simple +
fused +  and free +
2 +  and 3 +
dome--shaped +  and triangular +
Gramineae +
Panicum capillarioides +
Panicum sect. Panicum +
species +
membranous +
stipitate +  and sessile +
0.16 cm1.6 mm <br />0.0016 m <br /> - 0.2 cm2 mm <br />0.002 m <br /> +
0.1 cm1 mm <br />0.001 m <br /> - 0.11 cm1.1 mm <br />0.0011 m <br /> +
0.5 cm5 mm <br />0.005 m <br /> - 0.6 cm6 mm <br />0.006 m <br /> +
pubescent +  and glabrous +
rugose +  and verrucose +
chartaceous-indurate +  and rigid +
0.5 cm5 mm <br />0.005 m <br /> - 0.6 cm6 mm <br />0.006 m <br /> +
plant +  and cespitose +
aquatic +  and terrestrial +
dioecious +, monoecious +  and synoecious +