Isachne walkeri

HABIT Perennial; mat forming. Culms rambling; 30–150 cm long; woody; rooting from lower nodes. Culm-nodes glabrous. Leaf-sheaths outer margin hairy. Ligule a fringe of hairs. Leaf-blade base broadly rounded. Leaf-blades lanceolate; 3.5–20 cm long; 5–25 mm wide. Leaf-blade margins cartilaginous. Leaf-blade apex acuminate.

INFLORESCENCE Inflorescence a panicle.

Panicle open; ovate; 5–35 cm long; bearing few spikelets.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels glandular.

FERTILE SPIKELETS Spikelets comprising 2 fertile florets; without rhachilla extension. Spikelets obovate; dorsally compressed; 3–4.5 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 lanceolate, or ovate; 3–4 mm long; 1 length of spikelet; membranous; without keels; 7–9 -veined. Lower glume surface puberulous. Lower glume apex obtuse. Upper glume lanceolate, or ovate; 3–4.5 mm long; 1 length of spikelet; membranous; without keels; 9–11 -veined. Upper glume surface puberulous. Upper glume apex obtuse.

FLORETS Fertile lemma ovate, or obovate; 3–3.5 mm long; coriaceous; without keel. Lemma surface puberulous. Lemma margins involute. Lemma apex obtuse. Palea coriaceous; 2 -veined.

FLOWER Anthers 3; 1.8–2.4 mm long.

FRUIT Caryopsis with adherent pericarp.

DISTRIBUTION Asia-tropical: India.

NOTES Isachneae. Nair 1993.

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