Pennisetum macrostachys

(Brongn.) Trin.
Common names: Pacific fountaingrass
Treatment appears in FNA Volume 25.

Plants perennial, or annual in temperate climates; cespitose. Culms 100-300 cm, erect, branching; nodes glabrous. Leaves burgundy; sheaths glabrous; ligules 0.1-0.3 mm; blades 30-53.5 cm long, (15) 18-35 mm wide, flat, glabrous. Panicles terminal, (15.5) 18-40 cm long, 32-50 mm wide, fully exerted from the sheaths, flexible, drooping, burgundy; rachises terete, shortly pubescent. Fascicles 17-22 per cm; fascicle axes 0.5-0.7 mm, with 1 spikelet; outer bristles 21-40, 1.2-22.3 mm, scabrous; inner bristles absent; primary bristles 20-23 mm, not noticeably longer than the other bristles, scabrous. Spikelets 4.4-4.9 mm, sessile or pedicellate, glabrous; pedicels to 0.1 mm; lower glumes 1.1 - 1.3 mm, veinless; upper glumes 2.1 - 2.8 mm, usually about 1/2 as long as the spikelets, 1-3-veined; lower florets staminate (sterile); lower lemmas 4-4.5 mm, 5-veined; lower paleas absent or to 2.6 mm; anthers absent or 1.4-1.6 mm; upper lemmas 4.3-4.8 mm, 5-veined; anthers 1.6-1.8 mm. 2n = 68.

Discussion

Pennisetum macrostachys is native to the South Pacific. It is grown in the Flora region as an ornamental species, being sold as 'Burgundy Giant'.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

... more about "Pennisetum macrostachys"
1.4-1.6 mm +
0.16 cm1.6 mm <br />0.0016 m <br /> (0.18 cm1.8 mm <br />0.0018 m <br />) +
anatomy +  and kranz +
J.K. Wipff +
(Brongn.) 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 +
30 cm300 mm <br />0.3 m <br /> (53.5 cm535 mm <br />0.535 m <br />) +
usually linear +  and lanceolate occasionally ovate +
1.8 cm18 mm <br />0.018 m <br /> (3.5 cm35 mm <br />0.035 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 +
Pacific fountaingrass +
100 cm1,000 mm <br />1 m <br /> (300 cm3,000 mm <br />3 m <br />) +
not woody +
Wash. +, W.Va. +, Calif. +, Fla. +, Pacific Islands (Hawaii) +, Tex. +, Del. +, D.C +, Wis. +, Ariz. +, N.Mex. +, Conn. +, Mass. +, Maine +, N.H. +, R.I. +, Vt. +, La. +, Okla. +, Wyo. +, Puerto Rico +, N.J. +, N.C. +, N.Dak. +, Tenn. +, S.C. +, Pa. +, S.Dak. +, N.Y. +, Nev. +, Va. +, Ala. +, Ga. +, Iowa +, Idaho +, Kans. +, Mich. +, Minn. +, Mont. +, Nebr. +, Oreg. +, Colo. +, Virgin Islands +, Ark. +, Ill. +, Ind. +, Md. +, Ohio +, Utah +, Mo. +, Miss. +  and Ky. +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.07 cm0.7 mm <br />7.0e-4 m <br />) +
capillary +
germination +
pistillate +  and staminate +
sometimes longer +
compressed +  and terete +
shorter or longer +
subtending +
unequal +
membranous +
uncinate +
bracteate +  and ebracteate +
usually flatter and wider +
hollow +  and solid +
cauline +  and basal +
coriaceous +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.03 cm0.3 mm <br />3.0e-4 m <br />) +
membranous +
inconspicuous +
0.11 cm1.1 mm <br />0.0011 m <br /> (0.13 cm1.3 mm <br />0.0013 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
complex +  and simple +
concealed +  and prominent +
0.12 cm1.2 mm <br />0.0012 m <br /> (2.23 cm22.3 mm <br />0.0223 m <br />) +
18cm +  and 40cm +
subterranean +
1 +  and many +
3.2 cm32 mm <br />0.032 m <br /> (5 cm50 mm <br />0.05 m <br />) +
0 cm0 mm <br />0 m <br /> (0.01 cm0.1 mm <br />1.0e-4 m <br />) +
dry +  and fleshy +
not noticeably longer +
long-ciliate +  and scabrous +
2 cm20 mm <br />0.02 m <br /> (2.3 cm23 mm <br />0.023 m <br />) +
pedicellate +  and sessile +
in triplets +  and paired +
unisexual +  and bisexual +
compressed +  and terete +
0.44 cm4.4 mm <br />0.0044 m <br /> (0.49 cm4.9 mm <br />0.0049 m <br />) +
1 +  and 3 +
fused +  and free +
2 +  and 3 +
dome--shaped +  and triangular +
Gramineae +
Pennisetum macrostachys +
Pennisetum +
species +
membranous +
0.21 cm2.1 mm <br />0.0021 m <br /> (0.28 cm2.8 mm <br />0.0028 m <br />) +
0.43 cm4.3 mm <br />0.0043 m <br /> (0.48 cm4.8 mm <br />0.0048 m <br />) +
membranous +  and coriaceous +
annual +  and perennial +
plant +  and cespitose +
aquatic +  and terrestrial +
dioecious +, monoecious +  and synoecious +
9 +, 8 +, 7 +  and 5 +