Bambusa hainanensis

HABIT Perennial; caespitose. Rhizomes short; pachymorph. Culms scandent; woody. Culm-internodes terete; hollow. Lateral branches dendroid. Leaves cauline. Leaf-sheaths keeled; striately veined; glabrous on surface; outer margin glabrous. Leaf-sheath oral hairs lacking. Leaf-sheath auricles absent. Ligule a ciliolate membrane; pubescent on abaxial surface. Collar with external ligule. Leaf-blade base with a brief petiole-like connection to sheath; petiole glabrous. Leaf-blades lanceolate; 16–25 cm long; 19–32 mm wide. Leaf-blade venation without cross veins. Leaf-blade surface glabrous, or pilose; hairy abaxially. Leaf-blade apex acuminate.

INFLORESCENCE Synflorescence bractiferous; clustered at the nodes; in untidy tufts; with axillary buds at base of spikelet; prophyllate below lateral spikelets.

FERTILE SPIKELETS Spikelets comprising 2–3 fertile florets; with diminished florets at the apex. Spikelets lanceolate; subterete; 12–14 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes definite.

GLUMES Glumes one the lower absent or obscure, or two.

FLORETS Fertile lemma ovate; 10 mm long; purple; keeled; keeled above. Lemma surface glabrous. Lemma apex obtuse. Palea keels ciliolate. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 3; membranous. Anthers 6. Stigmas 3.

FRUIT Caryopsis with adherent pericarp.

DISTRIBUTION Asia-temperate: China.

NOTES Bambuseae. McClure 2002.

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