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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 kurokawana

HABIT Perennial. Rhizomes elongated; leptomorph. Culms erect; 70–80 cm long; 2.5–5 mm diam.; woody. Culm-internodes terete; hollow; 10 cm long; distally glabrous. Culm-nodes glabrous, or pubescent. Lateral branches suffrutescent. Bud complement 1. Branch complement one; solitary; as thick as stem. Culm-sheaths persistent. Leaves 4–6 per branch. Leaf-sheaths striately veined; glabrous on surface; outer margin hairy. Leaf-sheath oral hairs lacking. Ligule a ciliolate membrane; 1.5–3 mm long; pubescent on abaxial surface; truncate. Leaf-blade base with a brief petiole-like connection to sheath; petiole 0.3–1.1 cm long; petiole pubescent. Leaf-blades oblong; 15–29 cm long; 40–70 mm wide; light green and glaucous; discolorous with last colour beneath. Leaf-blade midrib prominent beneath. Leaf-blade venation with 14–22 secondary veins; with distinct cross veins. Leaf-blade surface puberulous; hairy abaxially. Leaf-blade margins scaberulous. Leaf-blade apex acuminate.

INFLORESCENCE Inflorescence a panicle.

Panicle open; oblong, or ovate; 10–14 cm long; 5–8 cm wide. Panicle axis puberulous. Panicle branches puberulous.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 4–8 fertile florets; with diminished florets at the apex. Spikelets linear; laterally compressed; 25–40 mm long; 15–40 mm wide; with hairs extending 2–3 mm beyond apex; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes eventually visible between lemmas; pubescent.

GLUMES Glumes persistent; dissimilar; shorter than spikelet; thinner than fertile lemma. Lower glume lanceolate. Lower glume surface pubescent. Lower glume apex acute. Upper glume ovate. Upper glume surface pubescent. Upper glume apex acute.

FLORETS Fertile lemma ovate; 7–8.5 mm long; chartaceous; without keel. Lemma surface pubescent; hairy above. Lemma apex acute. Palea 1 mm long; 7 -veined. Palea keels pubescent; adorned above. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 3; ciliate. Anthers 6. Stigmas 3.

FRUIT Caryopsis with adherent pericarp; oblong; 6 mm long; apex unappendaged.

DISTRIBUTION Asia-temperate: eastern Asia.

NOTES Arundinarieae. Makino 2002.

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