Isachne ascendens

HABIT Annual. Culms geniculately ascending; 15–30 cm long. Culm-internodes distally glabrous. Leaf-sheaths mostly shorter than adjacent culm internode; hispid; outer margin hairy. Ligule a fringe of hairs; 1 mm long. Leaf-blades lanceolate; 3–8 cm long; 4–8 mm wide. Leaf-blade surface pubescent; densely hairy. Leaf-blade apex acute.

INFLORESCENCE Inflorescence a panicle.

Panicle open; elliptic; 12–14 cm long; 6 cm wide. Primary panicle branches ascending; 6–8 cm long.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels 1–2.5 mm long.

FERTILE SPIKELETS Spikelets comprising 2 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; 1.5 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; 1.3 mm long; 0.9 length of spikelet; membranous; without keels. Lower glume surface glabrous, or puberulous. Lower glume apex obtuse. Upper glume ovate; 1.3 mm long; 0.9 length of spikelet; membranous; without keels. Upper glume surface glabrous, or puberulous. Upper glume apex obtuse.

FLORETS Fertile lemma elliptic; 1.3 mm long; coriaceous; without keel. Lemma surface pubescent. 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. Swallen 1997.

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