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Descriptions

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

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

Acostia

HABIT Perennial. Culms 25–40 cm long. Ligule a ciliolate membrane.

INFLORESCENCE Inflorescence composed of racemes.

Racemes borne along a central axis; unilateral. Rhachis angular.

Spikelets solitary, or in pairs. Fertile spikelets pedicelled; 1–2 in the cluster. Pedicels linear.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; 2–2.5 mm long; falling entire.

GLUMES Glumes one the lower absent or obscure; reaching apex of florets; thinner than fertile lemma. Upper glume lanceolate; membranous; without keels; 5 -veined. Upper glume surface pubescent. Upper glume apex acuminate.

FLORETS Basal sterile florets barren; without significant palea. Lemma of lower sterile floret lanceolate; membranous; 5 -veined; acuminate. Fertile lemma elliptic; coriaceous; wingless. Lemma surface unwrinkled; without grooves. Lemma margins involute. Lemma apex obtuse. Palea coriaceous.

DISTRIBUTION South America.

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