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Descriptions

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

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

Cyrtococcum patens

HABIT Perennial; mat forming. Culms decumbent, or prostrate, or rambling; 10–100 cm long; rooting from lower nodes. Culm-nodes glabrous. Leaf-sheaths glabrous on surface, or pilose, or hirsute; outer margin hairy. Ligule an eciliate membrane; 0.5–0.7 mm long; acute. Leaf-blade base asymmetrical. Leaf-blades linear, or lanceolate, or elliptic, or ovate; 1–10 cm long; 3–18 mm wide. Leaf-blade surface glabrous, or hirsute. Leaf-blade margins scaberulous; ciliate; hairy at base. Leaf-blade apex acuminate.

INFLORESCENCE Inflorescence a panicle.

Panicle open; obovate; 3–25 cm long. Primary panicle branches spreading.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels filiform.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets obovate; laterally compressed; compressed strongly; gibbous; 1.3–2 mm long; falling entire.

GLUMES Glumes similar; shorter than spikelet; thinner than fertile lemma. Lower glume ovate; 0.75–1.5 mm long; 0.5–0.75 length of spikelet; membranous; without keels; 3–5 -veined. Lower glume apex acute. Upper glume oblong; gibbous; 1–1.75 mm long; 0.75–1 length of spikelet; membranous; without keels; 3–5 -veined. Upper glume surface pubescent, or hispidulous. Upper glume apex acute.

FLORETS Basal sterile florets barren; without significant palea. Lemma of lower sterile floret similar to upper glume; oblong; 1.1–2 mm long; 1 length of spikelet; membranous; 5 -veined; pubescent; obtuse, or acute. Fertile lemma obovate; laterally compressed; gibbous; 1.25–2 mm long; indurate; without keel; 5–7 -veined. Lemma lateral veins obscure. Lemma margins involute. Lemma apex with a little green crest. Palea reflexed at apex; involute; indurate; 2 -veined.

FLOWER Anthers 3; 0.5–1 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: southwestern and northwestern.

NOTES Paniceae. HJW 2000.

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