GrassBase - The Online World Grass Flora

Descriptions

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

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

Yvesia

HABIT Annual. Culms erect, or geniculately ascending; 15–20 cm long. Ligule a fringe of hairs. Leaf-blades lanceolate.

INFLORESCENCE Inflorescence composed of racemes.

Racemes digitate; paucilateral; bearing few fertile spikelets; bearing 5–6 fertile spikelets on each. Rhachis subterete. Spikelet packing adaxial; distant.

Spikelets ascending; solitary. Fertile spikelets pedicelled. Pedicels oblong.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; 2.075–3 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. Upper glume surface pilose. Upper glume apex acute.

FLORETS Basal sterile florets barren; without significant palea. Lemma of lower sterile floret lanceolate; membranous; acute. Fertile lemma oblong; coriaceous; without keel; wingless. Lemma surface unwrinkled; without grooves. Lemma margins involute. Lemma apex acute; mucronate. Palea coriaceous.

FLOWER Anthers 3.

FRUIT Caryopsis with adherent pericarp; ellipsoid.

DISTRIBUTION Africa.

Please cite this publication as detailed in How to Cite Version: 27th January 2014.