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Descriptions

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

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

Cyrtochloa luzonica

HABIT Perennial; caespitose. Rhizomes short; pachymorph. Culms 100–200 cm long; 10 mm diam.; woody. Culm-internodes terete; with small lumen; 20–25 cm long; distally glabrous. Lateral branches dendroid. Culm-sheaths 3–5 cm long; glabrous; hairy on margins; auriculate; ciliate on shoulders. Culm-sheath blade triangular; acuminate. Leaf-sheaths striately veined; smooth; glabrous on surface. Leaf-sheath oral hairs setose. Ligule a ciliate membrane. Leaf-blade base cordate; with a brief petiole-like connection to sheath; petiole 0.3–0.5 cm long. Leaf-blades lanceolate; 10–20 cm long; 20–35 mm wide; coriaceous; light green. Leaf-blade venation indistinct; with 16–20 secondary veins. Leaf-blade surface glabrous. Leaf-blade margins cartilaginous. Leaf-blade apex acuminate.

INFLORESCENCE Synflorescence bractiferous; clustered at the nodes; in untidy tufts; with spathaceous subtending bracts; bracts 10–15 mm long; with axillary buds at base of spikelet; prophyllate below lateral spikelets; 15–60 cm long overall.

Fertile spikelets sessile.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets linear; laterally compressed; obtuse; 10 mm long; breaking up at maturity; disarticulating below each fertile floret.

GLUMES Glumes several; 2–3 empty glumes; persistent; shorter than spikelet. Lower glume ovate; chartaceous; without keels. Lower glume margins ciliate. Lower glume apex acute. Upper glume ovate; 7 mm long; chartaceous; without keels. Upper glume margins ciliate. Upper glume apex acute; mucronate.

FLORETS Fertile lemma ovate; 5–6 mm long; chartaceous; without keel; 5–9 -veined. Lemma margins convolute; covering most of palea; ciliate. Lemma apex acute. Palea tightly convolute around flower; 4–5 mm long; chartaceous; without keels. Palea surface pilose; hairy on margins.

FLOWER Lodicules 3; ciliate. Anthers 6; 2 mm long; anther tip smooth. Stigmas 3. Ovary with a steeple-like appendage; pubescent on apex.

FRUIT Caryopsis with free brittle pericarp.

DISTRIBUTION Asia-tropical: Malesia.

NOTES Bambuseae. Gamble 1996.

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