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Descriptions

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

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

Neohouzeaua helferi

HABIT Perennial; caespitose. Rhizomes short; pachymorph. Culms arching; 300–1500 cm long; 25–40 mm diam.; woody; eventually collapsing and rooting from upper nodes. Culm-internodes terete; hollow; 50–125 cm long; grey; distally pubescent. Lateral branches dendroid. Culm-sheaths persistent; 20–25 cm long; antrorsely scabrous (below); hispid; with appressed hairs; with white hairs; truncate at apex. Culm-sheath ligule 5–7.5 mm high; ciliate. Culm-sheath blade lanceolate; reflexed; glabrous on surface, or pubescent; acuminate. Leaf-sheaths smooth; glabrous on surface. Leaf-sheath oral hairs ciliate. Ligule an eciliate membrane. Leaf-blade base asymmetrical; with a brief petiole-like connection to sheath; petiole 0.75–1 cm long. Leaf-blades lanceolate, or oblong; 15–45 cm long; 25–75 mm wide. Leaf-blade venation with 14–30 secondary veins. Leaf-blade surface smooth. Leaf-blade margins scabrous. Leaf-blade apex attenuate.

INFLORESCENCE Synflorescence bractiferous; clustered at the nodes; in stellate clusters; 2–5 cm long; 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 1 fertile florets; without rhachilla extension, or with a barren rhachilla extension. Spikelets linear; laterally compressed; 12–25 mm long; breaking up at maturity; disarticulating below each fertile floret.

GLUMES Glumes persistent; shorter than spikelet. Lower glume ovate; 5 mm long; chartaceous. Lower glume margins ciliate. Lower glume apex acute; mucronate. Upper glume ovate; 8 mm long; chartaceous; without keels. Upper glume margins ciliate. Upper glume apex acute; mucronate.

FLORETS Fertile lemma lanceolate, or ovate; 12–25 mm long; chartaceous; without keel. Lemma surface hirsute. Lemma margins convolute. Lemma apex acute; mucronate. Palea tightly convolute around flower; 3–4 mm long; chartaceous; without keels. Palea apex awned.

FLOWER Lodicules absent. Anthers 6; 12–18 mm long; anther tip smooth. Filaments united in a tube. Stigmas 3; red. Ovary with a steeple-like appendage.

FRUIT Caryopsis with free brittle pericarp; 5 mm long.

DISTRIBUTION Asia-tropical: India and Indo-China.

NOTES Bambuseae. Gr Burma 1997.

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