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Descriptions

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

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

Schizostachyum nghianum

HABIT Perennial; caespitose. Rhizomes short; pachymorph. Culms erect; erect at the tip; 800–1200 cm long; 50–60 mm diam.; woody. Culm-internodes terete; hollow; 50–70 cm long; distally glabrous and pilose (when young). Culm-nodes swollen. Lateral branches dendroid. Branch complement many. Culm-sheaths tardily deciduous; 20–22 cm long; yellow; hispid; with dark brown hairs; hairy on margins; truncate at apex; without auricles; setose on shoulders; shoulders with 3 mm long hairs. Culm-sheath ligule 4–7 mm high; fimbriate. Culm-sheath blade linear, or lanceolate; reflexed; 10 cm long; acuminate. Leaves 4–6 per branch. Leaf-sheath oral hairs setose; 5–6 mm long. Leaf-sheath auricles absent. Ligule an eciliate membrane. Leaf-blade base asymmetrical; with a brief petiole-like connection to sheath; petiole 0.4–0.5 cm long. Leaf-blades lanceolate, or oblong, or ovate; 20–25 cm long; 35–45 mm wide. Leaf-blade surface puberulous; hairy abaxially. Leaf-blade apex acuminate.

INFLORESCENCE Synflorescence bractiferous; clustered at the nodes; in untidy tufts; with glumaceous subtending bracts; with axillary buds at base of spikelet; prophyllate below lateral spikelets; with 2-keeled prophylls; leafless between branches.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; with diminished florets at the apex. Spikelets linear, or lanceolate; subterete; 30 mm long; breaking up at maturity; disarticulating below each fertile floret.

GLUMES Glumes several; comprising 1 gemmiferous bracts (6–15 mm); 0 empty glumes; persistent; shorter than spikelet.

FLORETS Fertile lemma lanceolate, or oblong; 15–16 mm long; chartaceous; without keel. Lemma surface scabrous; rough above; pilose. Lemma margins convolute; covering most of palea. Lemma apex acute; mucronate. Palea tightly convolute around flower; 26 mm long; chartaceous; 2-keeled. Palea keels ciliate; adorned above.

FLOWER Lodicules absent. Anthers 6; 10 mm long; pallid. Stigmas 3.

DISTRIBUTION Asia-tropical: Indo-China.

NOTES Bambuseae. Xia & Tran 2014.

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