Isachne cambodiensis

HABIT Perennial. Culms erect; 20–30 cm long; 7–9 -noded. Culm-internodes smooth; distally glabrous. Leaf-sheaths mostly shorter than adjacent culm internode; striately veined; glabrous on surface, or pilose. Ligule a fringe of hairs. Leaf-blades linear, or lanceolate; involute; 7–15 cm long; 1–2 mm wide. Leaf-blade surface scaberulous; rough adaxially. Leaf-blade margins cartilaginous.

INFLORESCENCE Inflorescence a panicle.

Panicle open; ovate; 1.5–3 cm long. Primary panicle branches 5–6 in number; ascending; 0.6–1.2 cm long; bearing 1–3 fertile spikelets on each lower branch.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels 0.33–0.5 length of fertile spikelet.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets ovate; dorsally compressed; obtuse; 1.2 mm long; breaking up at maturity; disarticulating below each fertile floret.

GLUMES Glumes deciduous; similar; shorter than spikelet; thinner than fertile lemma. Lower glume ovate; 1 mm long; 0.9 length of spikelet; membranous; without keels. Lower glume surface scabrous; rough on veins. Upper glume elliptic; 1 mm long; 0.9 length of spikelet; membranous; without keels. Upper glume surface scabrous; rough on veins.

FLORETS Basal sterile florets male; with palea; separately deciduous. Lemma of lower sterile floret similar to fertile lemma; oblong; 1.2 mm long; 1 length of fertile lemma; herbaceous; glabrous. Fertile lemma ovate; 1.2 mm long; coriaceous; without keel. Lemma surface puberulous. Lemma margins involute. Lemma apex obtuse.

DISTRIBUTION Asia-tropical: Indo-China.

NOTES Isachneae. Ohwi 2006.

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