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Descriptions

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

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

Aulonemia setigera

HABIT Perennial. Rhizomes short; pachymorph. Culms scandent; 500–1000 cm long; woody. Culm-internodes terete; solid. Culm-nodes without obvious supra-nodal ridge. Lateral branches dendroid. Bud complement 1. Leaf-sheaths subequal to internodes; smooth. Leaf-sheath oral hairs setose. Ligule an eciliate membrane; 1 mm long; truncate. Collar with external ligule. Leaf-blade base with a brief petiole-like connection to sheath; petiole 0.8 cm long. Leaf-blades ovate; 12–24 cm long; 30–50 mm wide; mid-green and glaucous; discolorous with last colour beneath. Leaf-blade venation with distinct cross veins. Leaf-blade margins scaberulous. Leaf-blade apex attenuate.

INFLORESCENCE Inflorescence a panicle.

Panicle contracted; linear, or lanceolate; 20–45 cm long. Primary panicle branches 1 -nate; 12–24 cm long. Panicle axis smooth. Panicle branches with prominent pulvini.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 5–6 fertile florets; with diminished florets at the apex. Spikelets linear; subterete; 40–50 mm long; 3 mm wide; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 3 mm long; scaberulous; glabrous.

GLUMES Glumes several; 4 empty glumes; persistent; shorter than spikelet; thinner than fertile lemma. Lower glume ovate; 3–4 mm long; membranous; without keels; 3–5 -veined. Lower glume apex acute; mucronate. Upper glume ovate; 5–7 mm long; membranous; without keels; 5–7 -veined. Upper glume apex acute; mucronate.

FLORETS Fertile lemma lanceolate; 6–7 mm long; chartaceous; without keel; 7–9 -veined. Lemma lateral veins with cross-veins. Lemma apex obtuse; mucronate, or awned; 1 -awned. Principal lemma awn 3–5 mm long overall. Palea 1 length of lemma. Palea keels ciliolate.

FLOWER Lodicules 3; ciliate. Anthers 3; 6 mm long. Stigmas 2.

FRUIT Caryopsis with adherent pericarp.

DISTRIBUTION South America: Brazil.

NOTES Bambuseae. Soderstrom 1995.

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