Isachne bicolor

HABIT Annual. Culms decumbent; 30–45 cm long. Culm-internodes distally glabrous. Culm-nodes glabrous, or pubescent. Leaf-sheaths glabrous on surface, or pilose; outer margin hairy. Ligule absent. Leaf-blades lanceolate; 3.5–4.5 cm long; 3–7 mm wide. Leaf-blade venation distinct; with 22–30 secondary veins. Leaf-blade surface pilose; hairy on both sides; with tubercle-based hairs. Leaf-blade margins cartilaginous; smooth, or scaberulous.

INFLORESCENCE Inflorescence a panicle.

Panicle open; elliptic; 2–5 cm long. Primary panicle branches ascending; 1 -nate; 1–1.5 cm long. Panicle branches glandular.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels filiform; glandular.

FERTILE SPIKELETS Spikelets comprising 2 fertile florets; without rhachilla extension. Spikelets ovate; dorsally compressed; 2.75–3.25 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; 2.5–3 mm long; 0.9 length of spikelet; membranous; without keels; 5–9 -veined. Lower glume surface glabrous, or pilose; with tubercle-based hairs. Lower glume apex acute. Upper glume orbicular; 2.5–3 mm long; 0.9 length of spikelet; membranous; without keels; 5–9 -veined. Upper glume surface glabrous, or pilose; with tubercle-based hairs. Upper glume apex acute.

FLORETS Fertile lemma ovate; 2.25–2.5 mm long; coriaceous; without keel. Lemma surface pubescent. Lemma margins involute. Lemma apex obtuse. Palea coriaceous; 2 -veined.

FLOWER Anthers 3.

FRUIT Caryopsis with adherent pericarp.

DISTRIBUTION Asia-tropical: India.

NOTES Isachneae. Naik & Pat. 2005.

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