Dendrocalamus rugosiglumis

HABIT Perennial; caespitose. Rhizomes short; pachymorph. Culms erect; 1200 cm long; 90 mm diam.; woody. Culm-internodes terete. Lateral branches dendroid. Culm-sheaths 20–25 cm long; 2 times as long as wide; yellow; hispid; with appressed hairs; convex at apex; without auricles. Culm-sheath ligule 1 mm high; entire. Culm-sheath blade lanceolate. Ligule an eciliate membrane; 1 mm long. Leaf-blade base with a brief petiole-like connection to sheath; petiole 0.3–0.5 cm long. Leaf-blades oblong; 20–28 cm long; 40–50 mm wide; chartaceous. Leaf-blade venation with 20–30 secondary veins. Leaf-blade surface glabrous. Leaf-blade margins scabrous. 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; leafless between clusters.

Fertile spikelets sessile.

FERTILE SPIKELETS Spikelets comprising 4–5 fertile florets; without rhachilla extension. Spikelets ovate; laterally compressed; 7–10 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes suppressed between florets.

GLUMES Glumes two, or several; 2–3 empty glumes; persistent; similar; shorter than spikelet. Lower glume ovate; chartaceous; without keels. Upper glume ovate; 4–5 mm long; coriaceous; without keels. Upper glume surface glabrous. Upper glume margins ciliate. Upper glume apex acute.

FLORETS Fertile lemma ovate; 7–9 mm long; 6.5–8.5 mm wide; coriaceous; without keel. Lemma surface rugose (on margins). Lemma margins ciliate. Lemma apex acute. Palea 6–7 mm long; chartaceous; 2-keeled but the uppermost without keels. Palea keels ciliolate.

FLOWER Lodicules absent. Anthers 6. Filaments united in a tube. Stigmas 1.

FRUIT Caryopsis with adherent pericarp.

DISTRIBUTION Asia-tropical: Indo-China.

NOTES Bambuseae. Nguyen 2002.

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