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Descriptions

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

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

Sasa tatewakiana

HABIT Perennial. Rhizomes elongated; leptomorph. Culms erect; 150–200 cm long; woody. Culm-internodes terete; hollow; distally pubescent; with reflexed hairs. Culm-nodes pubescent. Lateral branches ample. Bud complement 1. Branch complement one; solitary; as thick as stem. Culm-sheaths persistent; puberulous; with reflexed hairs; without auricles. Leaf-sheaths puberulous. Leaf-sheath oral hairs lacking. Ligule an eciliate membrane. Leaf-blade base with a brief petiole-like connection to sheath. Leaf-blades lanceolate, or oblong; 20–30 cm long; 50–70 mm wide. Leaf-blade surface glabrous, or pubescent; sparsely hairy. Leaf-blade apex acuminate.

INFLORESCENCE Inflorescence a panicle.

Panicle open; ovate; 7 cm long.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 4–9 fertile florets; with diminished florets at the apex. Spikelets lanceolate; laterally compressed; 25–30 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 3 mm long; pubescent.

GLUMES Glumes one the lower absent or obscure, or two; persistent; similar; shorter than spikelet; thinner than fertile lemma. Lower glume lanceolate; 1–2 mm long; scarious; without keels. Lower glume apex acuminate. Upper glume lanceolate; 1–2 mm long; scarious; without keels. Upper glume apex acuminate.

FLORETS Fertile lemma ovate; 8 mm long; chartaceous; without keel; 13 -veined. Lemma lateral veins with cross-veins. Lemma surface scabrous. Lemma apex acuminate. Palea 6 mm long; 8 -veined. Palea keels ciliolate; adorned above. Palea surface scabrous. Palea apex with excurrent keel veins. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 3; ovate; 2 mm long; ciliate; obtuse. Anthers 6; 4 mm long. Stigmas 3.

FRUIT Caryopsis with adherent pericarp; apex unappendaged.

DISTRIBUTION Asia-temperate: Soviet far east and eastern Asia.

NOTES Arundinarieae. Ind. Jap. Bam. 2001.

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