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Descriptions

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

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

Cutandia dichotoma

HABIT Annual. Culms erect, or geniculately ascending, or decumbent; 5–30 cm long. Leaf-sheaths inflated; smooth. Ligule an eciliate membrane; 2–5 mm long. Leaf-blades 2–10 cm long; 0.5–1.5 mm wide.

INFLORESCENCE Inflorescence a panicle.

Panicle open; lanceolate; dense; 2–8 cm long. Primary panicle branches 1–2 -nate; branching divaricately. Panicle axis bearing deciduous branches. Panicle branches stiff; straight; angular; scabrous; with prominent pulvini.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels oblong; angular; 0.2–1 mm long; scabrous.

FERTILE SPIKELETS Spikelets comprising 2–4(–5) fertile florets; with diminished florets at the apex. Spikelets linear; laterally compressed; 6–11.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 1.5–2.5 mm long; pubescent.

GLUMES Glumes persistent; similar; shorter than spikelet. Lower glume lanceolate; 2.5–4.5 mm long; 0.4 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume primary vein smooth, or scaberulous. Lower glume lateral veins absent. Lower glume apex obtuse, or acute. Upper glume lanceolate; 2.7–5 mm long; 0.7–0.8 length of adjacent fertile lemma; membranous; 1-keeled; 1 -veined. Upper glume primary vein smooth, or scaberulous. Upper glume lateral veins absent. Upper glume apex obtuse, or acute.

FLORETS Fertile florets appressed to rhachilla; overlapping 0.3–0.4 their length. Fertile lemma lanceolate; 4–5.8 mm long; membranous; keeled; 3 -veined. Lemma surface glabrous, or pubescent. Lemma apex dentate; 2 -fid; mucronate. Palea keels scabrous. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 2; membranous. Anthers 3; 0.3–0.5 mm long. Ovary glabrous.

FRUIT Caryopsis with adherent pericarp; 2.5–3 mm long. Hilum punctiform.

DISTRIBUTION Africa: north, Macaronesia, and west tropical. Asia-temperate: Caucasus, western Asia, and Arabia.

NOTES Poeae. Fl Turk.

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