GrassBase - The Online World Grass Flora


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

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

Sasa tsukubensis

HABIT Perennial. Rhizomes elongated; leptomorph. Culms erect; 40–200 cm long; 1–7 mm diam.; woody. Culm-internodes terete; hollow; distally glabrous, or pubescent. Culm-nodes glabrous, or bearded. Lateral branches ample; arising from upper culm. Bud complement 1. Branch complement one; solitary; as thick as stem. Culm-sheaths persistent; glabrous; without auricles. Leaves 2–8 per branch. Leaf-sheaths glabrous on surface. Leaf-sheath oral hairs lacking, or ciliate. Ligule an eciliate membrane. Leaf-blade base with a brief petiole-like connection to sheath. Leaf-blades oblong; 9–30 cm long; 15–60 mm wide. Leaf-blade surface pubescent; hairy abaxially. Leaf-blade apex acuminate.

INFLORESCENCE Inflorescence a panicle.

Panicle open; ovate; 8–12 cm long.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 5–7 fertile florets; with diminished florets at the apex. Spikelets linear; laterally compressed; 30–45 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 5 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 mm long; scarious; without keels. Lower glume apex acuminate. Upper glume ovate; 4 mm long; scarious; without keels. Upper glume apex acuminate.

FLORETS Fertile lemma ovate; 8 mm long; chartaceous; without keel; 9 -veined. Lemma lateral veins with cross-veins. Lemma surface smooth. Lemma apex acuminate. Palea 8 -veined. Palea keels eciliate. Palea apex with excurrent keel veins. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 3. Anthers 6; 5 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.