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Descriptions

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

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

Sasamorpha oshidensis

HABIT Perennial. Rhizomes elongated; leptomorph. Culms erect; 100–200 cm long; 4–7 mm diam.; woody. Culm-internodes terete; hollow; distally glabrous, or pubescent; with reflexed hairs. Culm-nodes bearded. Lateral branches dendroid. Bud complement 1. Branch complement one; solitary; as thick as stem. Culm-sheaths persistent; glabrous; without auricles. Leaves 5–9 per branch. Leaf-sheaths glabrous on surface. Leaf-sheath oral hairs ciliate. Ligule an eciliate membrane. Leaf-blade base with a brief petiole-like connection to sheath. Leaf-blades oblong; 20–32 cm long; 40–55 mm wide. Leaf-blade surface glabrous. Leaf-blade apex acuminate.

INFLORESCENCE Inflorescence a panicle.

Panicle open; ovate; 8 cm long.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 4–6 fertile florets; with diminished florets at the apex. Spikelets lanceolate; laterally compressed; 15–20 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 ovate; 3 mm long; scarious; without keels; 1 -veined. Lower glume lateral veins absent. Lower glume apex acuminate. Upper glume ovate; 5 mm long; scarious; without keels; 3 -veined. Upper glume apex acuminate.

FLORETS Fertile lemma ovate; 8 mm long; chartaceous; without keel; 13 -veined. Lemma lateral veins with cross-veins. Lemma surface smooth. Lemma margins ciliolate. Lemma apex acuminate. Palea 1 length of lemma; 10–12 -veined. Palea keels ciliate; adorned above; with 0.5 of their length adorned. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 3; ovate; 2 mm long; veined; ciliate; acute. Anthers 6; 4 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.