Panicum longiloreum

HABIT Perennial. Culms prostrate (floating); 100–250 cm long; spongy; rooting from lower nodes. Culm-internodes distally glabrous. Culm-nodes glabrous. Leaf-sheaths loose; longer than adjacent culm internode; glabrous on surface. Ligule a ciliate membrane; 2–2.5 mm long. Leaf-blades 10–35 cm long; 5–7 mm wide. Leaf-blade surface glabrous. Leaf-blade apex acuminate.

INFLORESCENCE Inflorescence a panicle.

Panicle open; oblong; 25–35 cm long; 3–6 cm wide. Primary panicle branches appressed, or ascending; 10–20 cm long. Panicle branches scabrous.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels scaberulous.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic, or ovate; dorsally compressed; acute; 2.2–2.5 mm long; 0.8–1 mm wide; falling entire.

GLUMES Glumes reaching apex of florets; thinner than fertile lemma. Lower glume oblate; clasping; 0.2–0.5 mm long; 0.1–0.25 length of spikelet; hyaline; without keels; 0 -veined. Lower glume lateral veins absent. Lower glume apex truncate. Upper glume ovate; 1 length of spikelet; membranous; without keels; 7–9 -veined. Upper glume lateral veins with cross-veins. Upper glume apex acute.

FLORETS Basal sterile florets barren; with palea. Lemma of lower sterile floret similar to upper glume; ovate; 1 length of spikelet; membranous; 9 -veined; with cross-veins; acute. Fertile lemma elliptic; dorsally compressed; 1.7 mm long; 0.8–0.9 mm wide; indurate; yellow, or light brown; shiny; without keel; 7 -veined. Lemma surface smooth. Lemma margins involute. Lemma apex acute. Palea involute; indurate.

FLOWER Anthers 3.

DISTRIBUTION Asia-tropical: Indo-China.

NOTES Paniceae. Rahman 2001.

Please cite this publication as detailed in How to Cite Version: 3rd February 2016.