Australian Tropical Rainforest Plants - Online edition
Lophatherum gracile Brongn.
Brongniart, A.T. (1831) Voyage Autour du Monde. Botanique 2: 50. Type: Amboine, dans les Moluques.
Culms tufted from a knotty rootstock with fusiform roots, base of culms bulbous, slender, stiffly erect, 60-150 cm tall.
Leaf sheaths glabrous or pilose, margins with dense tubercle-based hairs; leaf blades 5-30 × 2-5 cm, glabrous or with long hairs on both surfaces, transverse veins between main veins prominent, base rounded to a 8-12 mm pseudopetiole; ligule brown, a ciliated membrane, hispid on backside.
Inflorescence 10-25 cm long with near horizontal branches that are triquetrous and scabrous on the margins; racemes few, 5-10 cm long, loosely spiculate, erect at first with appressed spikelets but later obliquely spreading and the spikelets patent; pedicels short, thick, scabrous with long hairs at base of glumes. Spikelets many-flowered, narrowly lanceolate, subterete, 7-12 mm, base glabrous or hairy; glumes ovate and rounded on back, subleathery with membranous margins, keeled with 2 veins on each side of the keel; lower glume 3-4.5 mm long, 5-veined, glabrous or stiffly hairy near margins and the apex; upper glume ca. 5 mm long and 5-7-veined, glabrous; lemma of fertile floret oblong with straight back, not keeled, 6-7 mm long, 7-13 -nerved, with awn; palea lanceolate, hyaline; awn of the fertile and sterile lemmas 1.5-2 mm long.
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