Isachne villosa

HABIT Annual. Culms decumbent; 10–40 cm long; rooting from lower nodes. Culm-nodes bearded. Leaf-sheaths pilose; with tubercle-based hairs; outer margin hairy. Ligule a fringe of hairs; 1–2 mm long. Leaf-blades lanceolate; 1.5–10 cm long; 3–7 mm wide. Leaf-blade surface hirsute.

INFLORESCENCE Inflorescence a panicle.

Panicle open; ovate; 3–12 cm long. Primary panicle branches ascending.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 2 fertile florets; without rhachilla extension. Spikelets ovate; dorsally compressed; 1.2–1.7 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes terete.

GLUMES Glumes deciduous; similar; shorter than spikelet; thinner than fertile lemma. Lower glume elliptic, or obovate; 1.2–1.7 mm long; 1 length of upper glume; 1 length of spikelet; membranous; without keels. Lower glume surface puberulous. Lower glume apex obtuse. Upper glume elliptic, or obovate; 1.2–1.7 mm long; 1 length of adjacent fertile lemma; membranous; without keels. Upper glume surface puberulous. Upper glume apex obtuse.

FLORETS Fertile lemma ovate; 1–1.5 mm long; coriaceous; without keel. Lemma surface papillose; puberulous. Lemma margins involute. Lemma apex obtuse. Palea coriaceous; 2 -veined.

FLOWER Anthers 3.

DISTRIBUTION Asia-tropical: Papuasia.

NOTES Isachneae. Reeder 1993.

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