Cenchrus longisetus M. C. Johnst.

Perennials, Terrestrial, not aquatic, Rhizomes present, Rhizome elongate, creeping, stems distant, Stems trailing, spreading or prostrate, Stems nodes swollen or brittle, Stems erect or ascending, Stems geniculate, decumbent, or lax, sometimes rooting at nodes, Stems mat or turf forming, Stems caespitose, tufted, or clustered, St ems terete, round in cross section, or polygonal, Stems compressed, flattened, or sulcate, Stem internodes solid or spongy, Stem internodes hollow, Stems with inflorescence less than 1 m tall, Stems, culms, or scapes exceeding basal leaves, Leaves mostly cauline, Leaves conspicuously 2-ranked, distichous, Leaves sheathing at base, Leaf sheath mostly open, or loose, Leaf sheath smooth, glabrous, Leaf sheath and blade differentiated, Leaf blades linear, Leaf blades 2-10 mm wide, Leaf blades mostly flat, Leaf blade margins folded, involute, or conduplicate, Leaf blades mostly glabrous, Leaf blades more or less hairy, Leaf blades scabrous, roughened, or wrinkled, Ligule present, Ligule a fringe of hairs, Inflorescence terminal, Inflorescence simple spikes, Inflorescence a dense slender spike-like panicle or raceme, branches contracted, Inflorescence solitary, with 1 spike, fascicle, glomerule, head, or cluster per stem or culm, Inflorescence spike linear or cylindric, several times longer than wide, Inflorescence single raceme, fascicle or spike, Flowers bisexual, Spikelets pedicellate, Spikelets sessile or subsessile, Spikelets dorsally compressed or terete, Spikelet less than 3 mm wide, Spikelets with 1 fertile floret, Spikelets with 2 florets, Spikelets 1-4 in short bristly fascicles, Spikelets all alike and fertille, Spikelets bisexual, Spikelets disarticulating below the glumes, Spikelets falling with parts of disarticulating rachis or pedicel, Spikelets in bur-like clusters or fascicles with fused bracts, bristles or spines, Spikelets all subtended by bristles, Spikelet bristles 4-many, Inner spikelet bristles all round, Spikelet bracts or bristles disarticulating with spikelet, Rachilla or pedicel hairy, Glumes present, empty bracts, Glumes 1 clearly present, the other greatly reduced or absent, Glumes 2 clearly present, Glumes distinctly unequal, Glumes shorter than adjacent lemma, Glumes 1 nerved, Glumes 3 nerved, Lemmas thin, chartace ous, hyaline, cartilaginous, or membranous, Lemma similar in texture to glumes, Lemma 5-7 nerved, Lemma 8-15 nerved, Lemma body or surface hairy, Lemma apex acute or acuminate, Lemma awnless, Lemma margins thin, lying flat, Lemma straight, Palea present, well developed, Palea membranous, hyaline, Palea about equal to lemma, Stamens 3, Styles 1, Styles 2-fid, deeply 2-branched, Stigmas 2, Fruit - caryopsis.

Pennisetum villosum is a species of flowering plant in the grass family Poaceae, known by the common name feathertop grass or just feathertop. It is native to northeastern Africa and parts of the Arabian Peninsula, and it is grown elsewhere as an ornamental plant. It can sometimes be found growing wild where it has escape cultivation. This is a perennial grass growing in rhizomatous clumps, producing erect stems up to about 75 centimeters tall. The inflorescence is a panicle of clustered spikelets surrounded by a cloudlike mass of plumose white bristles up to 5 centimeters long.

The Latin specific epithet villosum means “with soft hairs”.

In temperate zones it is hardy in mild or coastal areas, where temperatures do not fall much below freezing. Alternatively it is often grown as an annual.

This plant has gained the Royal Horticultural Society’s Award of Garden Merit.

Pennisetum villosum, l'herbe aux écouvillons, est une des espèces de plantes monocotylédones de la famille des Poaceae (graminées), sous-famille des Panicoideae.

Originaire des régions tropicales du Nord-Est de l'Afrique, elle peut cependant supporter des gels modérés (-5 °C). Cette espèce est parfois cultivée comme plante ornementale.

Pennisetum villosum é uma espécie de planta com flor pertencente à família Poaceae.

A autoridade científica da espécie é R.Br. ex Fresen., tendo sido publicada em Museum Senckenbergianum 2: 134. 1837.