Isachne cochinchinensis

HABIT Perennial; caespitose. Culms decumbent; 30–40 cm long. Leaf-sheaths striately veined; outer margin hairy. Ligule a fringe of hairs. Leaf-blades linear; flat, or convolute; 4–6 cm long; 2–3 mm wide. Leaf-blade midrib indistinct. Leaf-blade surface scabrous; rough on both sides; glabrous. Leaf-blade margins cartilaginous; scaberulous.

INFLORESCENCE Inflorescence a panicle.

Panicle open; lanceolate; 2–10 cm long; bearing few spikelets. Primary panicle branches appressed. Panicle axis scaberulous.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels scaberulous.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets ovate; dorsally compressed; obtuse; 2 mm long; breaking up at maturity; disarticulating above glumes but not between florets.

GLUMES Glumes deciduous; similar; shorter than spikelet; thinner than fertile lemma. Lower glume ovate; 1.7–1.9 mm long; 0.9 length of spikelet; membranous; without keels. Lower glume lateral veins distinct. Lower glume surface puberulous. Lower glume apex obtuse. Upper glume ovate; 1.7–1.9 mm long; 0.9 length of spikelet; membranous; without keels. Upper glume lateral veins distinct. Upper glume surface puberulous. Upper glume apex obtuse.

FLORETS Basal sterile florets male; with palea; attached to and deciduous with the fertile. Lemma of lower sterile floret similar to fertile lemma; ovate; 1.6–1.8 mm long; coriaceous; 7–9 -veined; obscurely veined; puberulous; obtuse. Fertile lemma ovate; 2 mm long; coriaceous; without keel; 7–9 -veined. Lemma lateral veins obscure. Lemma surface puberulous. Lemma margins involute. Lemma apex obtuse. Palea coriaceous; 2 -veined.

FLOWER Anthers 3.

FRUIT Caryopsis with adherent pericarp.

DISTRIBUTION Asia-tropical: Indo-China.

NOTES Isachneae. Lecomte 1997.

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