GrassBase - The Online World Grass Flora


W.D. Clayton, M. Vorontsova, K.T. Harman & H. Williamson

© Copyright The Board of Trustees, Royal Botanic Gardens, Kew.

Isachne pulchella

HABIT Annual. Culms prostrate; slender; 10–25 cm long. Culm-nodes bearded. Lateral branches sparse. Leaf-sheaths striately veined; glabrous on surface, or pilose; with tubercle-based hairs; outer margin hairy. Ligule a fringe of hairs. Leaf-blade base broadly rounded. Leaf-blades elliptic; 1–4 cm long; 5–10 mm wide; mid-green and glaucous; discolorous with last colour beneath. Leaf-blade surface puberulous; hairy on both sides. Leaf-blade margins cartilaginous; undulate; ciliate; hairy at base. Leaf-blade apex acute.

INFLORESCENCE Inflorescence a panicle.

Panicle open; elliptic, or oblong; 3–10 cm long; 0.5–3 cm wide. Primary panicle branches spreading; sparsely divided; 2.5 cm long. Panicle branches straight, or flexuous; glandular.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels filiform; glandular.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; 1.5–1.6 mm long; breaking up at maturity; disarticulating below each fertile floret.

GLUMES Glumes deciduous; similar; shorter than spikelet; thinner than fertile lemma. Lower glume elliptic; 1–1.2 mm long; 1 length of upper glume; 0.66–0.75 length of spikelet; herbaceous; without keels; 5 -veined. Lower glume apex obtuse. Upper glume elliptic; 1.25 mm long; 0.8 length of spikelet; herbaceous; without keels; 7 -veined. Upper glume apex obtuse.

FLORETS Basal sterile florets male; with palea. Lemma of lower sterile floret elliptic; 1.5 mm long; 5 -veined; obtuse. Fertile lemma elliptic; 1 mm long; coriaceous; pallid; without keel. Lemma surface pubescent. Lemma margins involute. Lemma apex obtuse. Palea coriaceous; 2 -veined.

FLOWER Lodicules 2; cuneate; fleshy. Anthers 3; 0.3–0.4 mm long.

FRUIT Caryopsis with adherent pericarp.

DISTRIBUTION Asia-temperate: China and eastern Asia. Asia-tropical: India, Indo-China, Malesia, and Papuasia. Australasia: Australia. Pacific: northwestern.

NOTES Isachneae. Bor 1992.

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