Pennisetum petiolare

(Hochst.) Chiov.
Treatment appears in FNA Volume 25.

Plants annual; tufted, rooting at the lower nodes. Culms 70-200 cm, slender, erect, branching; nodes glabrous. Sheaths glabrous; ligules 0.7-1 mm, of hairs; blades 3.5-30 cm long, 8-24 mm wide, flat, sparsely pubescent, abruptly rounded or cordate basally; lower blades with a 0.5-13 cm pseudopetiole. Panicles terminal and axillary, 3-8 cm, on long peduncles, fully exerted from the sheaths; rachises terete, hispid; disarticulation beneath the primary bristles, fascicle axes persistent. Fascicles 14-24 per cm; fascicle axes 0.4-0.6 mm, with 1 spikelet, outer and inner bristles absent; primary bristles 3.8-30 mm, scabrous. Spikelets 2.5-3.2 mm, sessile, green to purple. Glumes veinless, truncate or emarginate; lower glumes 0.2-0.3 mm; upper glumes 0.3-0.4 mm; lower florets sterile; lower lemmas 2.5-3.2 mm, strigulose above, 5-7-veined; lower paleas absent; upper lemmas 2.3-3 mm, sparsely puberulent, 5-veined; anthers 3, 1.5-1.9 mm. 2n = unknown.

Discussion

Pennisetum petiolare is native to northern Africa, where it grows in disturbed habitats. The only collection in the Flora region is from Ames, Iowa, where it grew from fallen bird seed. It is not known to be established anywhere in the region.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

... more about "Pennisetum petiolare"
3 cm30 mm <br />0.03 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
anatomy +  and kranz +
J.K. Wipff +
(Hochst.) Chiov. +
1 (?) +  and 3 (?) +
keeled +  and rounded +
pseudopetiolate +  and branching +
divergent +  and parallel +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
membranous +
pseudopetiolate +
non-radiate +  and radiate +
3.5 cm35 mm <br />0.035 m <br /> (30 cm300 mm <br />0.3 m <br />) +
cordate +  and rounded +
0.8 cm8 mm <br />0.008 m <br /> (2.4 cm24 mm <br />0.024 m <br />) +
spikelike +
reduced +
0 cm0 mm <br />0 m <br /> (1 cm10 mm <br />0.01 m <br />) +
disarticulating +
fused +  and free +
not developed +
terete +  and compressed +
sometimes longer +
slender +
70 cm700 mm <br />0.7 m <br /> (200 cm2,000 mm <br />2 m <br />) +
not woody +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
capillary +
germination +
pistillate +  and staminate +
sometimes longer +
compressed +  and terete +
emarginate +  and truncate +
shorter or longer +
subtending +
unequal +
membranous +
uncinate +
bracteate +  and ebracteate +
usually flatter and wider +
hollow +  and solid +
cauline +  and basal +
coriaceous +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
membranous +
inconspicuous +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.03 cm0.3 mm <br />3.0e-4 m <br />) +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.32 cm3.2 mm <br />0.0032 m <br />) +
complex +  and simple +
concealed +  and prominent +
subterranean +
1 +  and many +
3 cm30 mm <br />0.03 m <br /> (8 cm80 mm <br />0.08 m <br />) +
dry +  and fleshy +
long-ciliate +  and scabrous +
0.38 cm3.8 mm <br />0.0038 m <br /> (3 cm30 mm <br />0.03 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (13 cm130 mm <br />0.13 m <br />) +
in triplets +  and paired +
green +  and purple +
unisexual +  and bisexual +
compressed +  and terete +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.32 cm3.2 mm <br />0.0032 m <br />) +
1 +  and 3 +
fused +  and free +
2 +  and 3 +
dome--shaped +  and triangular +
Gramineae +
Pennisetum petiolare +
Pennisetum +
species +
membranous +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.04 cm0.4 mm <br />4.0e-4 m <br />) +
0.23 cm2.3 mm <br />0.0023 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
membranous +  and coriaceous +
aquatic +  and terrestrial +
dioecious +, monoecious +  and synoecious +
9 +, 8 +, 7 +  and 5 +