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.

Asthenochloa

HABIT Annual. Culms prostrate; 10–90 cm long; rooting from lower nodes. Ligule an eciliate membrane. Leaf-blades flaccid.

INFLORESCENCE Inflorescence a panicle with branches tipped by a raceme.

Panicle open.

Racemes bearing a triad of spikelets. Rhachis obsolete. Raceme-bases filiform.

Spikelets in threes. Fertile spikelets sessile; 1 in the cluster. Companion sterile spikelets pedicelled; 2 in the cluster. Pedicels oblong.

STERILE SPIKELETS Companion sterile spikelets represented by barren pedicels.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets ovate; laterally compressed; 1.66–2.4 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus bearded; base obtuse.

GLUMES Glumes exceeding apex of florets; firmer than fertile lemma. Lower glume ovate; cartilaginous; without keels; 5 -veined. Lower glume surface without pits. Lower glume apex dentate; 2 -fid. Upper glume oblong; cartilaginous; 3 -veined. Upper glume surface pubescent. Upper glume apex acute; mucronate.

FLORETS Basal sterile florets barren; without significant palea. Lemma of lower sterile floret oblong; hyaline. Fertile lemma oblong; hyaline; without keel; wingless; 1 -veined. Lemma surface unwrinkled; without grooves. Lemma apex lobed; 2 -fid; incised 0.4 of lemma length; awned; 1 -awned. Principal lemma awn from a sinus; geniculate. Palea absent or minute.

FLOWER Lodicules absent. Anthers 2.

DISTRIBUTION Tropical Asia.

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