Dendrocalamus parvigemma

HABIT Perennial; caespitose. Rhizomes short; pachymorph. Culms erect; erect at the tip, or nodding at the tip; 1000–1200 cm long; 100–120 mm diam.; woody; with aerial roots from the nodes. Culm-internodes terete; with small lumen; 35–45 cm long; mid-green; distally glabrous. Culm-nodes swollen; without exudate. Lateral branches dendroid; arising from upper culm. Bud complement 1. Branch complement several; with 1 branch dominant. Culm-sheaths deciduous; 24–30 cm long; 0.75 times as long as wide; coriaceous; brown; pilose; with appressed hairs; with dark brown hairs; auriculate; with 6–8 mm high auricles; setose on shoulders; shoulders with 4.5 mm long hairs. Culm-sheath ligule dentate. Culm-sheath blade lanceolate; reflexed; 4.5–5.5 cm long; 25–30 mm wide; pubescent (beneath). Leaves (7–)10–12(–16) per branch. Leaf-sheaths glabrous on surface. Ligule a ciliolate membrane. Leaf-blade base broadly rounded; with a brief petiole-like connection to sheath. Leaf-blades lanceolate; 32–40 cm long; 50–120 mm wide. Leaf-blade venation with 32 secondary veins. Leaf-blade surface scabrous; rough adaxially; puberulous; hairy adaxially.

INFLORESCENCE Synflorescence bractiferous; clustered at the nodes; in untidy tufts; lax; with glumaceous subtending bracts; with axillary buds at base of spikelet; prophyllate below lateral spikelets; with 1-keeled prophylls; leafless between clusters.

Fertile spikelets sessile.

FERTILE SPIKELETS Spikelets comprising 5–7 fertile florets; without rhachilla extension. Spikelets lanceolate; laterally compressed; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes suppressed between florets.

GLUMES Glumes several; 3–5 empty glumes; persistent; similar; shorter than spikelet. Upper glume ovate; 5–10 mm long; chartaceous; without keels. Upper glume margins ciliate. Upper glume apex acuminate.

FLORETS Fertile lemma ovate; 12–17 mm long; 8–12 mm wide; coriaceous; dark brown, or black; without keel. Lemma surface pilose. Lemma margins ciliate. Lemma hairs white. Lemma apex obtuse. Palea oblong; 1.4–1.6 mm long; 7 -veined; 2-keeled but the uppermost without keels. Palea surface pilose; hairy on back.

FLOWER Lodicules absent. Anthers 6; 6.5–7 mm long; yellow; anther tip pubescent. Filaments free; 7 mm long. Stigmas 1; plumose. Styles 8.5–13 mm long.

DISTRIBUTION Asia-tropical: Indo-China.

NOTES Bambuseae. Xia et al 2011.

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