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Descriptions

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

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

Colanthelia intermedia

HABIT Perennial; caespitose. Rhizomes short; pachymorph. Culms scandent; 500 cm long; woody. Culm-internodes terete; with small lumen; 12.5 cm long; striate; papillose; distally glabrous. Culm-nodes with distinct supra-nodal ridge. Lateral branches dendroid. Bud complement 1. Branch complement several; in a horizontal line; with 1 branch dominant; thinner than stem. Leaf-sheaths glabrous on surface. Leaf-sheath oral hairs setose. Ligule absent. Collar with external ligule. Leaf-blade base asymmetrical; with a brief petiole-like connection to sheath; petiole pubescent. Leaf-blades lanceolate; 5–10 cm long; 10–15 mm wide. Leaf-blade venation without cross veins. Leaf-blade surface glabrous. Leaf-blade margins scaberulous. Leaf-blade apex acuminate.

INFLORESCENCE Inflorescence a panicle.

Panicle open; ovate; 5–9 cm long. Primary panicle branches spreading. Panicle branches pilose; with prominent pulvini.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 8–12 fertile florets; with diminished florets at the apex. Spikelets linear; laterally compressed; 40–80 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes clavate; curved; 4 mm long; eventually visible between lemmas.

GLUMES Glumes persistent; similar; shorter than spikelet. Lower glume oblong; 3 mm long; 0.75 length of upper glume; chartaceous; 1-keeled; 1–3 -veined. Lower glume lateral veins absent, or obscure. Lower glume surface pubescent. Lower glume apex obtuse, or acute. Upper glume oblong; 4 mm long; 0.66 length of adjacent fertile lemma; chartaceous; 1-keeled; 1–3 -veined. Upper glume lateral veins absent, or obscure. Upper glume surface pubescent. Upper glume apex obtuse, or acute.

FLORETS Fertile lemma elliptic; 6–7 mm long; red; keeled; 5 -veined. Lemma apex acute; mucronate. Palea 6 -veined. Palea keels ciliolate; adorned above. Palea apex dentate; 2 -fid; with excurrent keel veins. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 3; ciliate. Anthers 3; red. Stigmas 2.

FRUIT Caryopsis with adherent pericarp.

DISTRIBUTION South America: Brazil.

NOTES Bambuseae. Fl Cat 1995.

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