Isachne lisboae

HABIT Annual. Culms decumbent; 10–15 cm long. Leaf-sheaths glabrous on surface, or pubescent. Ligule absent. Leaf-blades lanceolate; 2.5–5 cm long; 17 mm wide. Leaf-blade margins unthickened; ciliate. Leaf-blade apex acute.

INFLORESCENCE Inflorescence a panicle.

Panicle open; elliptic; 2.5–5 cm long. Primary panicle branches spreading; simple; 13–20 cm long. Panicle branches secund; pilose.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels pubescent.

FERTILE SPIKELETS Spikelets comprising 2 fertile florets; without rhachilla extension. Spikelets orbicular; dorsally compressed; 2.5–3 mm long; breaking up at maturity; disarticulating above glumes but not between florets.

GLUMES Glumes deciduous; similar; exceeding apex of florets; thinner than fertile lemma. Lower glume ovate, or orbicular; 1 length of spikelet; membranous; without keels; 5 -veined. Lower glume surface pubescent; hairy generally; with tubercle-based hairs. Lower glume apex cuspidate. Upper glume ovate, or orbicular; 1 length of spikelet; membranous; without keels; 5 -veined. Upper glume surface pubescent; hairy generally; with tubercle-based hairs. Upper glume apex cuspidate.

FLORETS Fertile lemma orbicular; hemispherical; 2–2.5 mm long; coriaceous; shiny; without keel. Lemma surface punctate; glabrous. Lemma margins involute. Lemma apex obtuse. Palea coriaceous; 2 -veined.

FRUIT Caryopsis with adherent pericarp.

DISTRIBUTION Asia-tropical: India.

NOTES Isachneae. Blatt & McCann 1994.

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