Isachne borii

HABIT Annual; culms solitary, or caespitose. Culms erect; 15–75 cm long. Culm-nodes glabrous, or pubescent. Leaf-sheaths 3–14 cm long; pilose; with tubercle-based hairs; outer margin hairy. Ligule a fringe of hairs; 2 mm long. Leaf-blades 7–15 cm long; 3–6 mm wide. Leaf-blade venation with 7–19 secondary veins. Leaf-blade surface scabrous; pubescent; with tubercle-based hairs. Leaf-blade margins cartilaginous; scabrous. Leaf-blade apex acuminate.

INFLORESCENCE Inflorescence a panicle. Peduncle 2–10 cm long.

Panicle open; elliptic; 5–20 cm long; 2–10 cm wide.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels filiform; 3–20 mm long; eglandular, or glandular; scabrous.

FERTILE SPIKELETS Spikelets comprising 2 fertile florets; without rhachilla extension. Spikelets orbicular; dorsally compressed; obtuse; 2.5–3 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus woolly. Floret callus hairs 1–3 mm long.

GLUMES Glumes deciduous; similar; reaching apex of florets; thinner than fertile lemma. Lower glume ovate; 1 length of spikelet; membranous; without keels. Lower glume surface hispidulous; with tubercle-based hairs. Lower glume apex obtuse. Upper glume ovate; 1 length of spikelet; membranous; without keels. Upper glume surface hispidulous; with tubercle-based hairs. Upper glume apex obtuse.

FLORETS Fertile lemma elliptic; 2–2.8 mm long; coriaceous; without keel. Lemma surface puberulous. Lemma margins involute. Lemma apex obtuse. Palea coriaceous; 2 -veined.

FLOWER Anthers 3; 1.9 mm long.

FRUIT Caryopsis with adherent pericarp; ellipsoid; 1.8 mm long.

DISTRIBUTION Asia-tropical: India.

NOTES Isachneae. Hemadri 1994.

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