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GrassBase - The Online World Grass Flora
Descriptions
W.D. Clayton, M. Vorontsova, K.T. Harman & H. Williamson
© Copyright The Board of Trustees, Royal Botanic Gardens, Kew.
Schizostachyum yalyense
HABIT Perennial; caespitose. Rhizomes short; pachymorph. Culms erect; 1000–1500 cm long; 45–55 mm diam.; woody. Culm-internodes terete; hollow; 95–117 cm long. Lateral branches dendroid. Branch complement many; with subequal branches. Culm-sheaths tardily deciduous; 26–27 cm long; 1 times as long as wide; coriaceous; yellow; antrorsely scabrous; concave at apex; without auricles; setose on shoulders; shoulders with 5–10 mm long hairs. Culm-sheath ligule 1 mm high; ciliolate. Culm-sheath blade linear; reflexed; 14–18 cm long; 8–10 mm wide; pubescent (at base). Leaf-sheaths glabrous on surface. Leaf-sheath oral hairs ciliate; 3–5 mm long. Leaf-sheath auricles absent. Ligule an eciliate membrane; 1 mm long. Leaf-blade base cuneate, or broadly rounded; with a brief petiole-like connection to sheath; petiole 0.4–0.5 cm long. Leaf-blades oblong; 30–34 cm long; 35–40 mm wide. Leaf-blade venation with 14–16 secondary veins. Leaf-blade apex acuminate.
INFLORESCENCE Synflorescence bractiferous; clustered at the nodes; in untidy tufts; with glumaceous subtending bracts; with axillary buds at base of spikelet; prophyllate below lateral spikelets; leafless between clusters; 40 cm long overall.
Fertile spikelets sessile.
FERTILE SPIKELETS Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 25 mm long; breaking up at maturity; disarticulating below each fertile floret.
GLUMES Glumes several; comprising 1–2 gemmiferous bracts; 1–2 empty glumes. Upper glume oblong; 5–6 mm long; 16–18 -veined. Upper glume margins ciliate. Upper glume mucronate.
FLORETS Fertile lemma lanceolate, or oblong; 20–22 mm long; chartaceous; without keel; 20–22 -veined. Lemma margins convolute; covering most of palea. Lemma apex acute; awned; 1 -awned. Principal lemma awn 6 mm long overall. Palea lanceolate, or oblong; tightly convolute around flower; 21–23 mm long; chartaceous; 10–14 -veined; 1-keeled.
FLOWER Lodicules 1; oblong; 10–12 mm long; ciliate. Anthers 6; 15–16 mm long; orange; anther tip penicillate. Filaments 29 mm long. Stigmas 3. Styles 30 mm long. Ovary with a steeple-like appendage; glabrous.
FRUIT Caryopsis with free brittle pericarp; oblong; 11–12 mm long.
DISTRIBUTION Asia-tropical: Indo-China.
NOTES Bambuseae. Xia et al 2011.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.
