Isachne puberula

HABIT Perennial. Culms decumbent; 15–30 cm long. Culm-internodes distally glabrous, or pubescent. Culm-nodes pubescent. Leaf-sheaths glabrous on surface, or pilose; with tubercle-based hairs; outer margin hairy. Ligule a fringe of hairs. Leaf-blades 2–5 cm long; 2–3 mm wide; stiff. Leaf-blade surface scabrous; rough on both sides; glabrous, or pilose; with tubercle-based hairs. Leaf-blade margins cartilaginous; scabrous. Leaf-blade apex acute.

INFLORESCENCE Inflorescence a panicle.

Panicle open; ovate; 3–6 cm long; 1.5–3 cm wide.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 2 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; 1.75 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes suppressed between florets.

GLUMES Glumes deciduous; similar; shorter than spikelet; thinner than fertile lemma. Lower glume elliptic, or oblong; 0.75 length of spikelet; membranous; without keels; 7–9 -veined. Lower glume surface flat; scabrous; rough between veins. Lower glume apex obtuse. Upper glume elliptic, or oblong; 0.8 length of spikelet; membranous; without keels; 7 -veined. Upper glume surface scabrous; rough between veins. Upper glume apex obtuse.

FLORETS Fertile lemma elliptic, or obovate; 1.5 mm long; chartaceous; without keel. Lemma surface puberulous. Lemma margins involute. Lemma apex obtuse. Palea chartaceous; 2 -veined.

FLOWER Anthers 3; 1–1.2 mm long.

FRUIT Caryopsis with adherent pericarp.

DISTRIBUTION Asia-tropical: Indo-China.

NOTES Isachneae. Bor 1993.

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