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.

Ochthochloa

HABIT Perennial. Stolons present. Culms decumbent; 10–90 cm long. Ligule a ciliate membrane.

INFLORESCENCE Inflorescence composed of racemes.

Racemes digitate; unilateral. Rhachis deciduous from axis; angular. Spikelet packing broadside to rhachis; crowded.

Spikelets appressed; solitary. Fertile spikelets sessile.

FERTILE SPIKELETS Spikelets comprising 4–8 fertile florets; with diminished florets at the apex. Spikelets elliptic, or oblong; laterally compressed; breaking up at maturity; disarticulating above glumes but not between florets. Rhachilla internodes definite.

GLUMES Glumes persistent; shorter than spikelet; thinner than fertile lemma. Lower glume oblong; 0.5 length of upper glume; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume surface without pits. Lower glume apex acute. Upper glume oblong; 0.7 length of adjacent fertile lemma; membranous; 1-keeled; 3 -veined. Upper glume apex acute.

FLORETS Fertile lemma ovate; chartaceous; keeled; wingless; 3 -veined. Lemma surface unwrinkled; without grooves; glabrous, or pilose. Lemma margins pubescent. Lemma apex acute; muticous, or mucronate. Palea keels ciliate. Apical sterile florets resembling fertile though underdeveloped.

FRUIT Caryopsis with free soft pericarp.

DISTRIBUTION Africa, or Temperate Asia, or Tropical Asia.

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