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Descriptions

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

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

Indosasa hispida

HABIT Perennial. Rhizomes elongated; leptomorph. Culms erect; 200–300 cm long; woody. Culm-internodes terete; hollow; distally glabrous, or hispid. Lateral branches dendroid. Branch complement three; in a horizontal line; with subequal branches, or 1 branch dominant; thinner than stem. Leaf-sheaths antrorsely scabrous. Leaf-sheath oral hairs lacking. Ligule an eciliate membrane; 1–2 mm long. Leaf-blade base with a brief petiole-like connection to sheath. Leaf-blades lanceolate; 6–23 cm long; 9–28 mm wide. Leaf-blade venation with distinct cross veins. Leaf-blade surface pilose; hairy abaxially. Leaf-blade margins spinulose. Leaf-blade apex acuminate.

INFLORESCENCE Synflorescence bractiferous; scanty; 24 cm long; lax; with glumaceous subtending bracts; bracts 20–30 mm long; without axillary buds at base of spikelet; prophyllate below lateral spikelets.

Fertile spikelets sessile.

FERTILE SPIKELETS Spikelets comprising 4–7 fertile florets; with diminished florets at the apex. Spikelets linear; laterally compressed; 30–50 mm long; breaking up at maturity; disarticulating below each fertile floret.

GLUMES Glumes persistent; similar; shorter than spikelet. Lower glume ovate; 8–12 mm long; 0.7–0.8 length of upper glume; chartaceous; without keels; 9 -veined. Lower glume surface hispid. Lower glume apex obtuse. Upper glume ovate; 11–17 mm long; 0.9–1.2 length of adjacent fertile lemma; chartaceous; without keels; 9 -veined. Upper glume surface hispid. Upper glume apex obtuse.

FLORETS Fertile lemma ovate; 12–14 mm long; chartaceous; without keel; 9 -veined. Lemma lateral veins with cross-veins. Lemma surface hispid. Lemma apex acuminate. Palea keels ciliate. Palea surface pilose; hairy on back. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 3; glabrous, or ciliate. Anthers 6. Stigmas 3. Ovary glabrous.

FRUIT Caryopsis with adherent pericarp.

DISTRIBUTION Asia-temperate: China.

NOTES Arundinarieae. WDC.

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