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Descriptions

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

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

Eremocaulon asymmetricum

HABIT Perennial; culms solitary. Rhizomes elongated; pachymorph. Culms scandent; 1500–2000 cm long; 7–10 mm diam.; woody. Culm-internodes terete; solid; 40–70 cm long. Lateral branches dendroid. Bud complement 1. Branch complement three, or several; in a clump; subtended by a bare patch above the node; with 1 branch dominant. Culm-sheaths persistent; without auricles, or auriculate; setose on shoulders. Culm-sheath ligule 1 mm high; ciliate. Culm-sheath blade lanceolate; reflexed; 8–10.5 cm long. Leaves cauline; 7–12 per branch. Leaf-sheaths outer margin hairy. Leaf-sheath oral hairs setose. Ligule a ciliolate membrane; 0.5–1 mm long. Collar with external ligule. Leaf-blade base asymmetrical. Leaf-blades deciduous at the ligule; lanceolate; 17.5–27.5 cm long; 11–18 mm wide. Leaf-blade venation with distinct cross veins.

INFLORESCENCE Synflorescence bractiferous; scanty; 20–40 cm long; with glumaceous subtending bracts; without axillary buds at base of spikelet; prophyllate below lateral spikelets.

Fertile spikelets sessile.

FERTILE SPIKELETS Spikelets comprising 3–11 fertile florets; with diminished florets at the apex. Spikelets linear; laterally compressed; 57–200 mm long; 6 mm wide; breaking up at maturity; disarticulating below each fertile floret.

GLUMES Glumes several; 1–3 empty glumes; persistent; similar; firmer than fertile lemma. Upper glume lanceolate; 13–15 mm long; coriaceous; without keels; 24–26 -veined. Upper glume margins ciliate. Upper glume apex obtuse.

FLORETS Fertile lemma ovate; 16–21 mm long; chartaceous; without keel; 34–35 -veined. Lemma lateral veins with cross-veins. Lemma margins ciliate. Lemma apex obtuse. Palea chartaceous; 14–18 -veined. Palea keels ciliate. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 3; veined; ciliate. Anthers 6. Stigmas 2. Ovary glabrous.

FRUIT Caryopsis with adherent pericarp.

DISTRIBUTION South America: Brazil.

NOTES Bambuseae. WDC.

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