Panicum luzonense* J. & C. Presl. Rel. Haenk. 1: 308 (1830).
Classification. (GPWG 2001) : Subfamily Panicoideae. Paniceae.
Type of Basionym or
Protologue Information: Philippine Islands: Luzon:, Haenke s.n. (HT:
PR (fragm., LE)).
(books and floras):  D.Sharp & B.K.Simon, AusGrass, Grasses of
Rhizomes absent. Stolons absent. Culms erect or geniculately ascending or
decumbent, 3–120 cm tall, 5–8 -noded. Mid-culm internodes glabrous or
pubescent. Mid-culm nodes pubescent. Lateral branches sparsely branched.
Leaf-sheaths hairy. Leaf-sheath auricles absent. Ligule a fringe of hairs,
1.5–2 mm long. Leaf-blades linear or lanceolate, 7–25 cm long, 6–15 mm wide.
Leaf-blade surface smooth, glabrous or indumented.
Inflorescence compound, a panicle. Panicle ovate, 15–50 cm long, evenly
Spikelets pedicelled. 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, elliptic or oblong,
dorsally compressed, 1.5–2.6 mm long. Rhachilla internodes elongated between
dissimilar, thinner than fertile lemma. Lower glume ovate, membranous, without
keels, 3–9 -nerved. apex obtuse. Lower glume apex muticous. Upper glume elliptic or ovate,
1.3–2.5 mm long, membranous, without keels, 7–11 -nerved. Florets. Basal
sterile florets 1, male or barren, with palea. Lemma of lower sterile floret
100 % of length of spikelet, membranous, 5–9 -nerved, mucronate.
Fertile lemma 1.3–2.2
mm long, without keel, 5 -nerved. Lemma apex mucronate. Anthers 3. Grain 1.4 mm
Distribution: Temperate Asia, Tropical Asia, Australasia, and Pacific.
Distribution: Northern Territory.
Darwin & Gulf.
Diagnostic features of P. luzonense include the anastomising nerves on
the glumes and lower lemma, spikelet length, presence of a lower palea and the
Introduced. Occurs in
the Darwin area of the N.T. as a weed in rice fields. Geobotanical
distribution: Arnhem. Native to India and Malesia. In tropical and subtropical
sub-humid woodlands and coastal grasslands. Flowers Jan.-May.