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Descriptions

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

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

Spodiopogon cotulifer

HABIT Perennial. Culms erect; 80–150 cm long; 4–6 -noded. Ligule an eciliate membrane; 2–4 mm long; obtuse. Leaf-blade base tapering to the midrib. Leaf-blades 15–50 cm long; 8–12 mm wide. Leaf-blade margins scabrous. Leaf-blade apex acuminate.

INFLORESCENCE Inflorescence a panicle with branches tipped by a raceme.

Panicle open; oblong; nodding; 15–20 cm long. Primary panicle branches whorled at most nodes; 2.5–7.5 cm long. Panicle branches bearded in axils.

Racemes 3–5 cm long. Rhachis tough; subterete. Rhachis internodes cuneate.

Spikelets in pairs. Fertile spikelets pedicelled; 2 in the cluster. Pedicels cuneate; unequal; 0.3–1 length of fertile spikelet; tip cupuliform.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; 5–6 mm long; falling entire. Spikelet callus pubescent; base obtuse; inserted. Spikelet callus hairs white.

GLUMES Glumes dissimilar; exceeding apex of florets; firmer than fertile lemma. Lower glume lanceolate; 1 length of spikelet; chartaceous; pallid; without keels; 7–9 -veined. Lower glume lateral veins ribbed. Lower glume surface scabrous. Lower glume margins ciliate. Lower glume apex dentate; 2 -fid; mucronate. Upper glume lanceolate; chartaceous; pallid; without keels; 7 -veined. Upper glume lateral veins ribbed. Upper glume surface scabrous; pilose. Upper glume margins ciliate. Upper glume apex dentate; 2 -fid; mucronate.

FLORETS Basal sterile florets barren; with palea, or without significant palea. Lemma of lower sterile floret oblong; 4.5 mm long; hyaline; scaberulous; rough above; obtuse. Fertile lemma linear; 4 mm long; hyaline. Lemma apex lobed; 2 -fid; with linear lobes; incised 0.4–0.5 of lemma length; awned; 1 -awned. Principal lemma awn from a sinus; geniculate; 12–15 mm long overall; with twisted column. Palea lanceolate; 1 length of lemma; hyaline; 0 -veined; without keels. Palea apex dentate; 2 -fid.

FLOWER Lodicules 2. Anthers 3; 3 mm long.

DISTRIBUTION Asia-temperate: China and eastern Asia. Asia-tropical: India.

NOTES Andropogoneae. Bor.

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