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Descriptions

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

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

Chusquea mimosa

HABIT Perennial. Culms erect; 300–400 cm long; 10–14 mm diam.; woody; without nodal roots. Culm-internodes terete; solid; 20–30 cm long; striate; distally glabrous. Lateral branches dendroid. Branch complement many. Culm-sheaths deciduous; 7–9 cm long; antrorsely scabrous. Culm-sheath ligule 1 mm high; ciliolate. Culm-sheath blade triangular; erect; scabrid. Leaf-sheaths without keel; striately veined; glabrous on surface. Leaf-sheath oral hairs lacking. Ligule an eciliate membrane; 0.5–2 mm long; truncate. Leaf-blade base cuneate. Leaf-blades linear, or lanceolate; 5–8 cm long; 3–8 mm wide. Leaf-blade venation with obscure cross veins. Leaf-blade surface glabrous.

INFLORESCENCE Inflorescence a panicle.

Panicle open; oblong; 1.5–3 cm long; 1.5 cm wide. Primary panicle branches indistinct the panicle almost racemose, or simple.

Spikelets solitary. Fertile spikelets sessile, or pedicelled.

FERTILE SPIKELETS Spikelets comprising 2 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; laterally compressed; 6–7 mm long; 1.5 mm wide; breaking up at maturity; disarticulating below each fertile floret.

GLUMES Glumes both absent or obscure.

FLORETS Basal sterile florets similar; barren; without significant palea; attached to and deciduous with the fertile. Lemma of lower sterile floret elliptic, or ovate; 3 mm long; 0.5 length of spikelet; chartaceous; 1-keeled; 1 -veined; without lateral veins; acute; muticous, or mucronate. Lemma of upper sterile floret elliptic, or ovate; 3 mm long; 1 length of lower sterile floret; chartaceous; acute; muticous, or mucronate. Fertile lemma lanceolate, or oblong; 6 mm long; coriaceous; mid-green, or red; without keel; 3 -veined. Lemma apex acute. Palea 1 length of lemma.

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

FRUIT Caryopsis with adherent pericarp; apex unappendaged.

DISTRIBUTION South America: Brazil.

NOTES Bambuseae. Fl Cat 1996.

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