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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 griffithii

HABIT Perennial; caespitose. Rhizomes short; pachymorph. Culms erect, or arching; 750–1500 cm long; 50–200 mm diam.; woody. Culm-internodes terete; hollow; 45–65 cm long; antrorsely scabrous. Lateral branches dendroid. Culm-sheaths 15 cm long; 4 times as long as wide; puberulous; hairy above; with appressed hairs; with white hairs; hairy on margins; auriculate; setose on shoulders; shoulders with curved hairs. Culm-sheath blade ovate; reflexed; 7.5–10 cm long. Leaf-sheaths keeled; striately veined; glabrous on surface, or pubescent; outer margin hairy. Leaf-sheath oral hairs setose; deciduous; 5–10 mm long. Leaf-sheath auricles falcate. Ligule a ciliolate membrane. Leaf-blade base with a brief petiole-like connection to sheath; petiole 0.5 cm long. Leaf-blades lanceolate; 15–25 cm long; 17–40 mm wide. Leaf-blade midrib conspicuous. Leaf-blade venation with 16–20 secondary veins; without cross veins. Leaf-blade margins scabrous. Leaf-blade apex acuminate; antrorsely scabrous.

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

Fertile spikelets sessile, or sessile and pedicelled.

FERTILE SPIKELETS Spikelets comprising 3–5 fertile florets; with diminished florets at the apex. Spikelets lanceolate; laterally compressed; 50–75 mm long; 5 mm wide; breaking up at maturity; disarticulating below each fertile floret.

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

FLORETS Fertile lemma ovate; 12 mm long; chartaceous; without keel; 9–11 -veined. Lemma surface pubescent. Lemma apex acute; mucronate. Palea chartaceous; 10 -veined. Palea keels ciliolate; adorned above.

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

FRUIT Caryopsis with free brittle pericarp; ovoid.

DISTRIBUTION Asia-tropical: India and Indo-China.

NOTES Bambuseae. Gamble 1996.

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