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Descriptions

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

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

Chloris affinis

HABIT Perennial. Stolons present. Culms prostrate; 6–10 cm long; rooting from lower nodes. Leaf-sheaths longer than adjacent culm internode; glabrous on surface; outer margin hairy. Ligule a ciliate membrane; 0.3 mm long. Collar glabrous. Leaf-blades conduplicate; 0.8–3.5 cm long; 2–3 mm wide. Leaf-blade surface scaberulous; rough adaxially; pilose. Leaf-blade margins scaberulous.

INFLORESCENCE Inflorescence composed of racemes.

Racemes 5; digitate; unilateral; 3 cm long. Rhachis angular; scabrous on margins. Spikelet packing broadside to rhachis.

Spikelets solitary. Fertile spikelets sessile.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; with diminished florets at the apex. Spikelets cuneate; laterally compressed; 2.5–3 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pubescent; obtuse.

GLUMES Glumes persistent; similar; shorter than spikelet; thinner than fertile lemma; gaping. Lower glume lanceolate; 1.5–2 mm long; 0.75 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume primary vein scabrous. Lower glume lateral veins absent. Lower glume apex acute. Upper glume lanceolate; 2–2.5 mm long; 0.75 length of adjacent fertile lemma; membranous; 1-keeled; 1 -veined. Upper glume primary vein scabrous. Upper glume lateral veins absent. Upper glume apex acute.

FLORETS Fertile lemma ovate; laterally compressed; 2.5–3 mm long; cartilaginous; keeled; 3 -veined. Lemma apex dentate; 2 -fid; awned; 1 -awned. Principal lemma awn from a sinus; 2.5–3 mm long overall. Palea 1 length of lemma. Palea keels ciliolate. Rhachilla extension 1.5 mm long. Apical sterile florets 1 in number; barren; lanceolate; 0.5–0.8 mm long. Apical sterile lemmas dentate; 2 -fid; muticous, or awned; 1 -awned. Apical sterile lemma awns 0.3–0.5 mm long; 1 per spikelet in number.

FLOWER Lodicules 2; cuneate; fleshy. Anthers 3. Stigmas 2.

FRUIT Caryopsis with adherent pericarp; trigonous.

DISTRIBUTION South America: southern South America.

NOTES Cynodonteae. Caro & Sanchez 1997.

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