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.

Pleioblastus nagashima

HABIT Perennial. Rhizomes elongated; leptomorph. Culms 100–200 cm long; 3–5 mm diam.; woody. Culm-internodes terete; hollow; distally pubescent; with reflexed hairs. Culm-nodes bearded. Lateral branches dendroid. Culm-sheaths puberulous; with reflexed hairs; without auricles. Leaf-sheaths puberulous. Leaf-sheath oral hairs setose; erect. Ligule an eciliate membrane, or a ciliolate membrane. Leaf-blade base with a brief petiole-like connection to sheath. Leaf-blades deciduous at the ligule; lanceolate; 14–18 cm long; 20–25 mm wide. Leaf-blade surface glabrous, or puberulous; densely hairy; hairy adaxially. Leaf-blade apex attenuate.

INFLORESCENCE Inflorescence comprising only a few spikelets; comprising 1 fertile spikelets.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 6–7 fertile florets; with diminished florets at the apex. Spikelets linear; laterally compressed; 45–50 mm long; breaking up at maturity; disarticulating below each fertile floret.

GLUMES Glumes two; persistent; similar; shorter than spikelet; similar to fertile lemma in texture. Lower glume lanceolate; 12 mm long; chartaceous; without keels. Lower glume apex acute. Upper glume lanceolate; chartaceous; without keels. Upper glume apex acute.

FLORETS Fertile lemma ovate; 12–15 mm long; chartaceous; without keel; 9 -veined. Lemma apex acuminate. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 3. Anthers 3. Stigmas 3.

FRUIT Caryopsis with adherent pericarp; apex unappendaged.

DISTRIBUTION Asia-temperate: eastern Asia.

NOTES Arundinarieae. Index Jap. Bam. 2001.

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