Isachne fischeri

HABIT Annual. Culms erect, or geniculately ascending; 3–5 cm long. Leaf-sheaths pilose; with tubercle-based hairs. Ligule a fringe of hairs. Leaf-blades lanceolate, or elliptic; 0.5–0.8 cm long; 1–3.5 mm wide. Leaf-blade surface hirsute; hairy on both sides.

INFLORESCENCE Inflorescence a panicle, or composed of racemes.

Panicle contracted; linear; 1–1.5 cm long. Primary panicle branches indistinct the panicle almost racemose.

Racemes 1; single; paucilateral; 1–1.5 cm long; bearing few fertile spikelets. Spikelet packing lax.

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; reaching apex of florets; thinner than fertile lemma. Lower glume lanceolate, or ovate; 2–2.5 mm long; 0.75–0.9 length of spikelet; membranous; without keels; 5 -veined. Lower glume surface pubescent; with tubercle-based hairs. Lower glume apex acuminate. Upper glume lanceolate, or ovate; 2–3 mm long; 1 length of spikelet; membranous; without keels; 5–7 -veined. Upper glume surface pilose; with tubercle-based hairs. Upper glume apex acuminate.

FLORETS Fertile florets with the lowest dissimilar. Lowest fertile lemma oblong, or ovate; 2–2.5 mm long; 1.3–2 length of adjacent lemma; thinner than adjacent lemma. Fertile lemma elliptic, or ovate; 1–2 mm long; coriaceous; without keel. Lemma surface pubescent. Lemma margins involute. Lemma apex obtuse. Palea coriaceous; 2 -veined. Palea surface pubescent.

FLOWER Anthers 3; 1 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.