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Descriptions

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

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

Koordersiochloa longiarista

HABIT Perennial; caespitose. Culms decumbent; 30–90 cm long. Leaf-sheaths smooth, or retrorsely scabrous. Leaf-sheath auricles erect. Ligule an eciliate membrane; 6–12 mm long. Leaf-blades drooping; 7–27 cm long; 5–12 mm wide; glaucous. Leaf-blade apex attenuate.

INFLORESCENCE Inflorescence a panicle.

Panicle contracted; linear; nodding; 10–25 cm long. Primary panicle branches simple; 5–10 cm long.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels filiform.

FERTILE SPIKELETS Spikelets comprising 2–6 fertile florets; with diminished florets at the apex. Spikelets lanceolate, or oblong; laterally compressed; 16–30 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 2–3 mm long; eventually visible between lemmas. Floret callus elongated; 2–3 mm long; pubescent; pungent; disarticulating obliquely.

GLUMES Glumes persistent; similar; shorter than spikelet; thinner than fertile lemma. Lower glume linear; 6–10 mm long; 0.6–0.8 length of upper glume; membranous; without keels; 3 -veined. Lower glume apex acute. Upper glume linear; 10–13 mm long; 0.8–1 length of adjacent fertile lemma; membranous; without keels; 5 -veined. Upper glume apex acute.

FLORETS Fertile lemma lanceolate; 10–17 mm long; chartaceous; without keel; 7 -veined. Lemma apex entire, or dentate; 2 -fid; awned; 1 -awned. Principal lemma awn dorsal; arising 0.7–0.8 way up back of lemma; coiled; 20–43 mm long overall. Apical sterile florets 1–2 in number; abscissing from fertile floret; in a clump; linear; 2–4 mm long. Apical sterile lemmas awned; 1 -awned.

FLOWER Lodicules 2; free; cuneate; fleshy; truncate. Anthers 3; 2.5–3 mm long. Stigmas 2. Ovary glabrous.

FRUIT Caryopsis with adherent pericarp. Embryo 0.1 length of caryopsis. Hilum punctiform.

DISTRIBUTION Africa: west-central tropical, northeast tropical, east tropical, southern tropical, and south. Asia-tropical: Malesia.

NOTES Meliceae. FTEA.

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