Isachne albens

HABIT Perennial. Culms erect; 30–100 cm long. Leaf-sheaths 5.5–10 cm long; smooth; glabrous on surface, or hirsute. Ligule a fringe of hairs. Leaf-blades linear, or lanceolate; 5–30 cm long; 7–25 mm wide; stiff. Leaf-blade surface scaberulous; rough on both sides. Leaf-blade margins cartilaginous; scaberulous. Leaf-blade apex acuminate.

INFLORESCENCE Inflorescence a panicle.

Panicle open; ovate; effuse; 8–40 cm long; 4–20 cm wide. Primary panicle branches spreading. Panicle branches capillary.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels eglandular.

FERTILE SPIKELETS Spikelets comprising 2 fertile florets; without rhachilla extension. Spikelets orbicular; dorsally compressed; 1.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes definite; 0.5 mm long.

GLUMES Glumes deciduous; similar; exceeding apex of florets; thinner than fertile lemma. Lower glume orbicular; 1.4 mm long; 1 length of spikelet; membranous; much thinner on margins; without keels; 5 -veined. Lower glume surface asperulous; rough at apex. Lower glume apex obtuse. Upper glume orbicular; 1.4 mm long; 1.1 length of adjacent fertile lemma; membranous; without keels; 5(–7) -veined. Upper glume apex obtuse.

FLORETS Fertile lemma orbicular; 1 mm long; cartilaginous; pallid; without keel. Lemma surface glabrous, or puberulous. Lemma margins involute. Lemma apex obtuse. Palea coriaceous; 2 -veined.

FLOWER Anthers 3; 0.8 mm long; yellow.

FRUIT Caryopsis with adherent pericarp.

DISTRIBUTION Asia-temperate: China and eastern Asia. Asia-tropical: India, Indo-China, Malesia, and Papuasia.

NOTES Isachneae. Gilliland 1993.

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