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Descriptions

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

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

Schizostachyum gracile

HABIT Perennial; caespitose. Rhizomes short; pachymorph. Culms arching; 300–400 cm long; 15–20 mm diam.; woody. Culm-internodes terete; hollow; distally pubescent. Lateral branches dendroid. Branch complement many. Culm-sheaths pubescent; with appressed hairs; with tawny hairs; auriculate; with 10 mm high auricles; setose on shoulders; shoulders with curved hairs; shoulders with 10 mm long hairs. Culm-sheath ligule 0.5 mm high; ciliate. Culm-sheath blade ovate; erect; 3–4.5 cm long; 15–30 mm wide; pubescent (at base); acuminate. Leaf-sheath oral hairs ciliate. Leaf-sheath auricles falcate. Ligule an eciliate membrane. Leaf-blade base with a brief petiole-like connection to sheath. Leaf-blades lanceolate; 10–20 cm long; 10–20 mm wide. Leaf-blade surface glabrous.

INFLORESCENCE Synflorescence bractiferous; clustered at the nodes; in untidy tufts (1–5 tufts); with glumaceous subtending bracts; with axillary buds at base of spikelet; prophyllate below lateral spikelets; leafy between clusters.

Fertile spikelets sessile.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; with diminished florets at the apex. Spikelets lanceolate; laterally compressed; 12–14 mm long; breaking up at maturity; disarticulating below each fertile floret.

GLUMES Glumes several.

FLORETS Fertile lemma ovate; 8–9 mm long; chartaceous; without keel. Lemma surface glabrous. Lemma margins convolute; covering most of palea. Lemma apex acute. Palea tightly convolute around flower; 10–12 mm long; chartaceous. Palea keels contiguous above a sulcus. Palea apex dentate; 2 -fid. Rhachilla extension 6–7 mm long. Apical sterile florets 1 in number; rudimentary.

FLOWER Lodicules 3; ciliate. Anthers 6. Stigmas 3. Ovary with a steeple-like appendage.

FRUIT Caryopsis with free brittle pericarp; 20 mm long. Embryo 0.05 length of caryopsis. Hilum linear; 1 length of caryopsis.

DISTRIBUTION Asia-tropical: Indo-China and Malesia.

NOTES Bambuseae. Holttum 1995.

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