Isachne truncata

HABIT Perennial. Culms decumbent; 40–50 cm long. Leaf-sheaths outer margin hairy. Ligule a fringe of hairs. Leaf-blades lanceolate; 8–10 cm long; 5–11 mm wide. Leaf-blade surface pilose; sparsely hairy. Leaf-blade margins cartilaginous; scaberulous. Leaf-blade apex attenuate.

INFLORESCENCE Inflorescence a panicle.

Panicle open; pyramidal; 12–20 cm long; 15–25 cm wide. Primary panicle branches 8–10 in number; spreading; 1–2 -nate.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels 3–15 mm long.

FERTILE SPIKELETS Spikelets comprising 2 fertile florets; without rhachilla extension. Spikelets orbicular, or obovate; dorsally compressed; truncate; 2 mm long; breaking up at maturity; disarticulating below each fertile floret.

GLUMES Glumes deciduous; similar; reaching apex of florets; thinner than fertile lemma. Lower glume orbicular; 1 length of spikelet; membranous; without keels. Lower glume surface pubescent. Lower glume apex emarginate, or truncate. Upper glume orbicular; 1 length of spikelet; membranous; without keels. Upper glume surface pubescent. Upper glume apex emarginate, or truncate.

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

FLOWER Anthers 3.

FRUIT Caryopsis with adherent pericarp.

DISTRIBUTION Asia-temperate: China. Asia-tropical: Indo-China.

NOTES Isachneae. Camus 1994.

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