Pennisetum nervosum

(Nees) Trin
Common names: Bentspike fountaingrass
Introduced
Treatment appears in FNA Volume 25.

Plants perennial; cespitose. Culms 1.5-2 (4) m, decumbent, geniculate, branching; nodes glabrous. Leaves green; sheaths glabrous; ligules 0.5-1.5 mm; blades 23-40 cm long, 7-12 mm wide, flat, glabrous. Panicles terminal, 15-22 cm long, 15-21 mm wide, fully exerted from the sheaths, flexible, drooping, green; rachises terete, puberulent. Fascicles 24-49 per cm; fascicle axes 0.4-0.5 mm, with 1 spikelet; most bristles only slightly longer than the spikelets; outer bristles 27-41, 2.4-8.5 mm; inner bristles 3-5, 6.2-11 mm, scabrous; primary bristles 7.6-11.8 mm, not noticeably longer than the other bristles, scabrous. Spikelets 5.2-6.6 mm, sessile; lower glumes 1.7-2.9 mm, 1-veined; upper glumes 4.5-6.3 mm, about as long as the spikelets, (7) 9-veined; lower florets sterile; lower lemmas 4.8-6 mm, 7-veined, acuminate to attenuate, midvein excurrent for 0-0.6 mm; lower paleas absent; upper lemmas 4.9-6 mm, 5-veined, acuminate to attenuate, midvein excurrent for 0-0.6 mm; anthers 1.3-1.7 mm. 2n = 36.

Discussion

Pennisetum nervosum is native to South America. It has been introduced into the Flora region, being known from populations adjacent to the Rio Grande River in Cameron and Hidalgo counties, Texas, and San Diego County, California.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number."elongated" is not a number.

... more about "Pennisetum nervosum"
0.13 cm1.3 mm <br />0.0013 m <br /> (0.17 cm1.7 mm <br />0.0017 m <br />) +
anatomy +  and kranz +
J.K. Wipff +
(Nees) Trin +
1 (?) +  and 3 (?) +
keeled +  and rounded +
pseudopetiolate +  and branching +
divergent +  and parallel +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
membranous +
pseudopetiolate +
non-radiate +  and radiate +
23 cm230 mm <br />0.23 m <br /> (40 cm400 mm <br />0.4 m <br />) +
usually linear +  and lanceolate occasionally ovate +
7mm;12mm +
spikelike +
reduced +
disarticulating +
fused +  and free +
only slightly longer +
not developed +
terete +  and compressed +
sometimes longer +
Bentspike fountaingrass +
ascending +  and erect +
geniculate +
150 cm1,500 mm <br />1.5 m <br /> (200 cm2,000 mm <br />2 m <br />) +
not woody +
Calif. +  and Tex. +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
capillary +
germination +
pistillate +  and staminate +
sometimes longer +
compressed +  and terete +
shorter or longer +
subtending +
unequal +
membranous +
uncinate +
bracteate +  and ebracteate +
0.62 cm6.2 mm <br />0.0062 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
usually flatter and wider +
hollow +  and solid +
cauline +  and basal +
coriaceous +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
membranous +
inconspicuous +
0.17 cm1.7 mm <br />0.0017 m <br /> (0.29 cm2.9 mm <br />0.0029 m <br />) +
acuminate +  and attenuate +
0.48 cm4.8 mm <br />0.0048 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
complex +  and simple +
concealed +  and prominent +
0.24 cm2.4 mm <br />0.0024 m <br /> (0.85 cm8.5 mm <br />0.0085 m <br />) +
15cm +  and 22cm +
subterranean +
1 +  and many +
1.5 cm15 mm <br />0.015 m <br /> (2.1 cm21 mm <br />0.021 m <br />) +
dry +  and fleshy +
not noticeably longer +
long-ciliate +  and scabrous +
0.76 cm7.6 mm <br />0.0076 m <br /> (1.18 cm11.8 mm <br />0.0118 m <br />) +
Introduced +
in triplets +  and paired +
unisexual +  and bisexual +
compressed +  and terete +
0.52 cm5.2 mm <br />0.0052 m <br /> (0.66 cm6.6 mm <br />0.0066 m <br />) +
1 (?) +  and 3 (?) +
fused +  and free +
2 (?) +  and 3 (?) +
dome--shaped +  and triangular +
Gramineae +
Pennisetum nervosum +
Pennisetum +
species +
membranous +
0.45 cm4.5 mm <br />0.0045 m <br /> (0.63 cm6.3 mm <br />0.0063 m <br />) +
acuminate +  and attenuate +
0.49 cm4.9 mm <br />0.0049 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
membranous +  and coriaceous +
plant +  and cespitose +
aquatic +  and terrestrial +
dioecious +, monoecious +  and synoecious +
9 +, 8 +, 7 +  and 5 +