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.

Thedachloa

HABIT Annual. Stolons present. Culms decumbent; slender; 10–30 cm long; rooting from lower nodes. Culm-nodes constricted. Lateral branches lacking, or sparse. Ligule a fringe of hairs.

INFLORESCENCE Inflorescence a panicle.

Panicle spiciform.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets ovate; laterally compressed; gibbous; 1.7–2.1 mm long; falling entire.

GLUMES Glumes shorter than spikelet; thinner than fertile lemma. Lower glume ovate; clasping; hyaline; without keels; 3 -veined. Lower glume lateral veins obscure. Lower glume surface without pits. Lower glume apex obtuse. Upper glume ovate; gibbous; 1.6–1.9 length of adjacent fertile lemma; membranous; without keels; 7 -veined. Upper glume surface setose; with tubercle-based hairs. Upper glume apex acute.

FLORETS Basal sterile florets male, or barren; with palea. Lemma of lower sterile floret elliptic; membranous; 7 -veined; sulcate; acute. Fertile lemma elliptic; cartilaginous; without keel; wingless. Lemma surface unwrinkled; without grooves. Lemma margins involute.

FRUIT Caryopsis with adherent pericarp. Embryo 0.45 length of caryopsis.

DISTRIBUTION Australasia.

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