Isachne trachycaula

HABIT Perennial; caespitose. Culms erect; 40–50 cm long. Culm-internodes distally hispid. Culm-nodes pubescent. Leaf-sheaths hispid; with tubercle-based hairs. Ligule a fringe of hairs. Leaf-blades 4–6 cm long; 2–3 mm wide. Leaf-blade surface pilose; with tubercle-based hairs.

INFLORESCENCE Inflorescence a panicle.

Panicle open; ovate; 6–8 cm long.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels filiform.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets orbicular; dorsally compressed; 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 orbicular; 1.5 mm long; 1 length of upper glume; 0.75 length of spikelet; membranous; without keels; 9–11 -veined. Lower glume surface scabrous; glabrous. Lower glume apex obtuse. Upper glume ovate; 1.3 mm long; 0.75 length of spikelet; membranous; without keels; 9–11 -veined. Upper glume surface scabrous; glabrous. Upper glume apex obtuse.

FLORETS Fertile lemma oblong; 2 mm long; coriaceous; without keel. Lemma surface puberulous. Lemma margins involute. Lemma apex obtuse. Palea coriaceous.

FLOWER Anthers 3.

FRUIT Caryopsis with adherent pericarp.

DISTRIBUTION Asia-tropical: Malesia.

NOTES Isachneae. Ohwi 2001.

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