Cenchrus purpureus*

Cenchrus purpureus*( Schum.) Morrone,  Ann. Bot. 106:
129 (2010). .

Classification. (GPWG 2001) : Subfamily
Panicoideae. Paniceae.

Basionym and/or
Replacement Name:
Schumach., Beskr. Guin. Pl. 44 (1827).

Type of Basionym or
Protologue Information
: Africa: Ghana: Guinea, Thonning 355 (HT: C;
IT: BM).

Key references
(books and floras):
[1952] C.A.Gardner, Flora of Western Australia 1
Gramineae (281) as Pennisetum purpureum, [2002] D.Sharp & B.K.Simon, AusGrass, Grasses of
as Pennisetum purpureum [2008] S.W.L.Jacobs, R.D.B.Walley & D.J.B.Wheeler, Grasses
of New South Wales
(334) as Pennisetum purpureum.

[1952] C.A.Gardner, Flora of Western Australia 1 Gramineae (282,
Pl. 81), as Pennisetum purpureum [2008] S.W.L.Jacobs, R.D.B.Whalley & D.J.B.Wheeler, Grasses of
New South Wales
, 4th edn (334) as Pennisetum purpureum.

Perennial. Rhizomes absent or present. Stolons absent or present. Culms erect
or geniculately ascending, stature robust to moderate, 100–600 cm tall. Ligule
a fringe of hairs, 3–5 mm long. Leaf-blades 30–120 cm long, 20–40 mm wide.

Inflorescence solid, a panicle. Panicle linear, 7–30 cm long, 1–3 cm wide.

Spikelets sessile, 1 in the cluster. Companion spikelets pedicelled, 0–4 in the
cluster. Involucre composed of bristles. Companion spikelets developed, male,
4.5–7 mm long. Fertile spikelets 2-flowered, the lower floret barren (rarely
male), the upper fertile, comprising 1 basal sterile florets, comprising 1
fertile floret(s), without rachilla extension, lanceolate, dorsally compressed,
4.5–7 mm long.

Glumes. Glumes
thinner than fertile lemma. Upper glume lanceolate or ovate, 0.75–3 mm long,
membranous, without keels, 0–1 -nerved. Florets. Basal sterile florets
1, male or barren, with palea or without significant palea. Lemma of lower
sterile floret 66–100 % of length of spikelet, chartaceous, (1–)2–5(–7)

Fertile lemma 5–7 mm
long, without keel, 5–7 -nerved. Lodicules absent or vestigial. Anthers 3.
Grain 1.8–2.2 mm long.

: Africa, Temperate Asia, Tropical Asia, Australasia, Pacific,
North America, and South America.

: Western Australia, Northern Territory, South Australia,
Queensland, New South Wales, Norfolk I.

Western Australia:
Gardner. Northern Territory: Darwin & Gulf. South Australia:
Northern Lofty. Queensland: Cook, Moreton, Port Curtis, South Kennedy,
Wide Bay, North Kennedy. New South Wales: North Coast.

Introduced. In tropical heaths, tropical and subtropical rain forests, tropical
and subtropical wet sclerophyll forests, tropical and subtropical sub-humid
woodlands, temperate sub-humid woodlands, semi-arid shrub woodlands, and acacia
shrublands. A valuable introduced species that occasionally escapes from
cultivation. Flowers Apr.-Aug.


AVH 2011


Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith