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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 takizawana

HABIT Perennial. Rhizomes elongated; leptomorph. Culms erect; 100–200 cm long; 4–7 mm diam.; woody. Culm-internodes terete; hollow; distally glabrous, or pubescent. Culm-nodes glabrous, or pubescent. Lateral branches dendroid. Bud complement 1. Branch complement one; solitary; as thick as stem. Culm-sheaths persistent; glabrous; without auricles. Leaves 5–8 per branch. Leaf-sheaths glabrous on surface. Leaf-sheath oral hairs lacking, or setose. Ligule an eciliate membrane. Leaf-blade base with a brief petiole-like connection to sheath. Leaf-blades oblong; 20–28 cm long; 35–60 mm wide. Leaf-blade surface pubescent; hairy abaxially. Leaf-blade apex acuminate.

INFLORESCENCE Inflorescence a panicle.

Panicle open; obovate; 12 cm long.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 5–8 fertile florets; with diminished florets at the apex. Spikelets linear; laterally compressed; 25–30 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 3–4 mm long; pubescent.

GLUMES Glumes persistent; similar; shorter than spikelet; thinner than fertile lemma. Lower glume lanceolate; 5 mm long; scarious; without keels; 1–3 -veined. Lower glume lateral veins absent, or obscure. Lower glume apex acuminate. Upper glume lanceolate; 7 mm long; scarious; without keels; 5–7 -veined. Upper glume apex acuminate.

FLORETS Fertile lemma ovate; 7–10 mm long; chartaceous; without keel; 13 -veined. Lemma lateral veins with cross-veins. Lemma surface scaberulous. Lemma margins ciliolate. Lemma apex acuminate. Palea 6–9 mm long; 10 -veined. Palea keels ciliate. Palea apex with excurrent keel veins. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 3; ovate; 2 mm long; veined; ciliate; acute. Anthers 6; 6 mm long. Stigmas 3.

FRUIT Caryopsis with adherent pericarp; apex unappendaged.

DISTRIBUTION Asia-temperate: eastern Asia.

NOTES Arundinarieae. Ind. Jap. Bam. 2001.

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