Dendrocalamus bacthaiensis

HABIT Perennial; caespitose. Rhizomes short; pachymorph. Culms erect; 600–800 cm long; 30–40 mm diam.; woody. Culm-internodes terete. Lateral branches dendroid. Culm-sheaths 17 cm long. Leaf-sheaths pilose. Ligule an eciliate membrane; 1.5 mm long. Leaf-blade base asymmetrical; with a brief petiole-like connection to sheath; petiole 0.7–1 cm long. Leaf-blades oblong; 30–33 cm long; 70–80 mm wide. Leaf-blade surface pubescent; sparsely hairy; hairy abaxially. Leaf-blade apex acuminate.

INFLORESCENCE Synflorescence bractiferous; clustered at the nodes; in globose clusters; with glumaceous subtending bracts; with axillary buds at base of spikelet; prophyllate below lateral spikelets.

Fertile spikelets sessile.

FERTILE SPIKELETS Spikelets comprising 3–4 fertile florets; without rhachilla extension. Spikelets lanceolate; laterally compressed; 12–15 mm long; 6–7 mm wide; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes definite.

GLUMES Glumes several; 2–3 empty glumes; persistent; similar; shorter than spikelet. Upper glume ovate; 3–4 mm long. Upper glume margins ciliate. Upper glume apex acute.

FLORETS Fertile lemma ovate; 7–8 mm long; chartaceous; without keel. Lemma surface rugose (below). Lemma margins tuberculate; ciliate. Lemma apex acute. Palea chartaceous; 2-keeled but the uppermost without keels. Palea keels ciliate.

FLOWER Lodicules absent. Anthers 6. Stigmas 1. Ovary umbonate.

FRUIT Caryopsis with adherent pericarp.

DISTRIBUTION Asia-tropical: Indo-China.

NOTES Bambuseae. Nguyen 1996.

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