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Descriptions

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

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

Neomicrocalamus prainii

HABIT Perennial. Rhizomes elongated; pachymorph. Culms scandent; 500–1000 cm long; 5–8 mm diam.; woody. Culm-internodes terete; with small lumen, or solid; 20–25 cm long; yellow. Culm-nodes swollen. Lateral branches dendroid. Branch complement several. Culm-sheaths 5–15 cm long; 5–8 times as long as wide; antrorsely scabrous; convex at apex. Culm-sheath blade inconspicuous. Leaves cauline. Leaf-sheaths striately veined; smooth. Ligule an eciliate membrane; obtuse. Leaf-blade base with a brief petiole-like connection to sheath; petiole 0.2 cm long. Leaf-blades lanceolate, or oblong; 5–10 cm long; 8–18 mm wide. Leaf-blade midrib evident. Leaf-blade venation with 4–6 secondary veins; without cross veins. Leaf-blade margins scabrous. Leaf-blade apex attenuate; filiform.

INFLORESCENCE Inflorescence composed of racemes; terminal and axillary; bracteate at pedicel base.

Racemes 1; single; paucilateral; 6–9 cm long; bearing few fertile spikelets; bearing 2–4 fertile spikelets on each.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 3–6 fertile florets; with diminished florets at the apex. Spikelets linear; laterally compressed; 25–35 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes flattened; clavate; curved; eventually visible between lemmas.

GLUMES Glumes two, or several; 2(–3) empty glumes; persistent; dissimilar; shorter than spikelet. Lower glume lanceolate; membranous; 1-keeled. Lower glume margins ciliate. Lower glume apex acute. Upper glume ovate; membranous; without keels; 3–5 -veined. Upper glume surface pilose; hairy at apex. Upper glume apex acute.

FLORETS Fertile lemma ovate; 10 mm long; membranous; without keel; 9–11 -veined. Lemma lateral veins prominent. Lemma apex acute. Palea 1 length of lemma. Palea keels ciliolate. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 3; veined; ciliate. Anthers 6; anther tip apiculate. Stigmas 3. Ovary umbonate; pubescent on apex.

FRUIT Caryopsis with adherent pericarp.

DISTRIBUTION Asia-temperate: China. Asia-tropical: India.

NOTES Bambuseae. Gamble 1995.

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