Pacific Island Ecosystems at Risk (PIER)

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Pennisetum pedicellatum
Trin., Poaceae
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Present on Pacific Islands?  yes

Primarily a threat at high elevations?  no

Common name(s): [more details]

English: annual kyasuwa grass, hairy fountain grass, kayasuwa grass, kyasuwa grass

Habit:  grass

Description:  "Habit: Annual. Culms geniculately ascending; 30-150 cm long. Lateral branches ample. Ligule a ciliate membrane. Leaf-blades 5-25 cm long; 4-15 mm wide. Inflorescence a panicle. Panicle spiciform; linear; straight, or curved; 5-15 cm long. Primary panicle branches accrescent to a central axis; with sessile scars on axis. Panicle axis with briefly decurrent ribs; glabrous; bearing deciduous spikelet clusters. Spikelets subtended by an involucre. Fertile spikelets sessile and pedicelled; 1-5 in the cluster; 0-1 sessile. Involucre composed of bristles; ovate; 5-10 mm long; base obtuse. Involucral bristles deciduous with the fertile spikelets; numerous; 15-25 in principal whorl; with one conspicuously longer bristle; 16-24 mm long; terete; flexible; woolly. Pedicels 0.5-3.5 mm long.  Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; 3.5-6 mm long; falling entire; deciduous with accessory branch structures; readily shedding fertile florets. Glumes dissimilar; reaching apex of florets; thinner than fertile lemma. Lower glume lanceolate, or oblong; 1-3 mm long; 0.33-0.5 times length of spikelet; hyaline; without keels; 0-1 -veined. Lower glume lateral veins absent. Lower glume surface pubescent; hairy below. Lower glume apex emarginate, or obtuse, or acute. Upper glume ovate; 1 times length of spikelet; membranous; without keels; 5-7 -veined. Upper glume surface pubescent; hairy below. Upper glume margins eciliate, or ciliate. Upper glume apex acute; muticous, or mucronate. Florets: Basal sterile florets male, or barren; with palea, or without significant palea. Lemma of lower sterile floret similar to upper glume; oblong; 1 times length of spikelet; membranous; 5 -veined; puberulous; dentate; 3 -fid. Fertile lemma lanceolate; 2.5-3 mm long; coriaceous; shiny; without keel; 5 -veined. Lemma margins flat. Lemma apex obtuse. Palea coriaceous. Flower: Lodicules absent. Anthers 3; 1.5-2.5 mm long; anther tip smooth"  (GrassBase).

Habitat/ecology:  (no habitat/ecology info known by PIER)

Propagation:  Seed

Native range:  Africa and India (GRIN).

Presence:

Pacific
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
New Caledonia
New Caledonia Archipelago
Île Grande Terre introduced
invasive
MacKee, H. S. (1994) (p. 61)
"Seule spécimen"; voucher cited: MacKee 17564
Spontané
Philippines
Philippine Islands
Philippine Islands   Hafliger, Ernst/Scholz, Hildemar (1980) (p. 113)
Pacific Rim
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
Australia
Australia (continental)
Australia (continental)   Hafliger, Ernst/Scholz, Hildemar (1980) (p. 113)
Also reported from
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
United States (continental except west coast)
United States (other states)
USA (Florida) introduced
invasive
U.S. Dept. Agr., Agr. Res. Serv. (2013)


Need more info? Have questions? Comments? Information to contribute? Contact PIER! (pier@hear.org)

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This page was created on 12 FEB 2007 and was last updated on 30 NOV 2008.