Isachne setosa

HABIT Annual. Culms erect, or geniculately ascending; 5–30 cm long. Culm-nodes bearded. Leaf-sheaths pilose; with tubercle-based hairs. Ligule a fringe of hairs. Leaf-blade base broadly rounded, or cordate. Leaf-blades lanceolate, or ovate; 0.3–2.5 cm long; 1–12 mm wide. Leaf-blade surface pubescent.

INFLORESCENCE Inflorescence a panicle.

Panicle open; ovate; 0.5–5 cm long.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 2 fertile florets; without rhachilla extension. Spikelets elliptic, or obovate; dorsally compressed; 2–3 mm long; breaking up at maturity; disarticulating below each fertile floret.

GLUMES Glumes deciduous; similar; exceeding apex of florets; thinner than fertile lemma. Lower glume lanceolate, or ovate; 2–3 mm long; 1 length of spikelet; membranous; without keels; 5 -veined. Lower glume surface setose; with tubercle-based hairs. Lower glume apex acuminate. Upper glume lanceolate, or ovate; 2–3 mm long; 1 length of spikelet; membranous; without keels. Upper glume surface setose; with tubercle-based hairs. Upper glume apex acuminate.

FLORETS Fertile florets with the lowest dissimilar. Lowest fertile lemma oblong, or ovate; 1.5–2.5 mm long; 1.5–3 length of adjacent lemma; thinner than adjacent lemma. Fertile lemma orbicular; 0.5–1.5 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. Nair 1993.

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