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Descriptions

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

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

Teinostachyum beddomei

HABIT Perennial; caespitose. Rhizomes short; pachymorph. Culms leaning; 300–600 cm long; 25–37 mm diam.; woody. Culm-internodes terete; hollow; 35–45 cm long; light green; antrorsely scabrous. Lateral branches dendroid. Culm-sheaths 25–30 cm long; 3–3.5 times as long as wide; chartaceous; pubescent; with appressed hairs; with dark brown hairs, or black hairs; truncate at apex; without auricles. Culm-sheath ligule 2–3 mm high; entire. Culm-sheath blade linear; reflexed; 12.5–17.5 cm long; 10–12 mm wide. Leaf-sheaths striately veined; glabrous on surface. Leaf-sheath auricles absent. Ligule an eciliate membrane; erose. Leaf-blade base asymmetrical; with a brief petiole-like connection to sheath; petiole 0.7–1 cm long. Leaf-blades lanceolate, or oblong; 12–38 cm long; 25–50 mm wide. Leaf-blade midrib conspicuous. Leaf-blade venation with 16–20 secondary veins; with obscure cross veins. Leaf-blade surface pilose; sparsely hairy; hairy abaxially. Leaf-blade margins scabrous. Leaf-blade apex acuminate.

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

Fertile spikelets sessile.

FERTILE SPIKELETS Spikelets comprising 2–3 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 12–25 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes sparsely hairy; hairy at tip.

GLUMES Glumes one the lower absent or obscure; persistent; shorter than spikelet. Upper glume ovate; 10 mm long; chartaceous; without keels; 5–7 -veined. Upper glume surface pilose. Upper glume apex acute; mucronate.

FLORETS Fertile lemma ovate; 12–14 mm long; chartaceous; without keel. Lemma lateral veins with cross-veins. Lemma apex acute; mucronate. Palea chartaceous; 7–9 -veined. Palea keels ciliate.

FLOWER Lodicules 3; 2 mm long; veined; ciliate. Anthers 6; anther tip smooth. Stigmas 2. Ovary with a steeple-like appendage; glabrous.

FRUIT Caryopsis with free brittle pericarp; ovoid.

DISTRIBUTION Asia-tropical: India.

NOTES Bambuseae. Gamble 1996.

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