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Descriptions

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

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

Andropogon lividus

HABIT Perennial; caespitose; clumped densely. Basal innovations flabellate. Culms 25–90 cm long. Leaf-sheath auricles erect; 2–6 mm long. Ligule an eciliate membrane; 2–6 mm long. Leaf-blades erect; 7–20 cm long; 2–4 mm wide. Leaf-blade surface glabrous.

INFLORESCENCE Inflorescence composed of racemes; terminal, or terminal and axillary.

Racemes 2(–4); paired; 2–5 cm long. Rhachis fragile at the nodes; ciliate on margins. Rhachis internodes clavate. Rhachis internode tip transverse; cupuliform; with scarious rim. Raceme-bases brief; unequal (the longer measured); 3–5 mm long.

Spikelets appressed; in pairs. Fertile spikelets sessile; 1 in the cluster. Companion sterile spikelets pedicelled; 1 in the cluster. Pedicels linear; ciliate.

STERILE SPIKELETS Companion sterile spikelets well-developed; male; lanceolate; dorsally compressed; 6–7 mm long; as long as fertile. Companion sterile spikelet glumes chartaceous; acute; muticous. Companion sterile spikelet lemmas enclosed by glumes.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic, or oblong; dorsally compressed; 6–8 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus pubescent; base obtuse; inserted.

GLUMES Glumes dissimilar; exceeding apex of florets; firmer than fertile lemma. Lower glume elliptic; 1 length of spikelet; coriaceous; 2-keeled; keeled laterally; winged on keel; winged narrowly; winged near apex. Lower glume intercarinal veins distinct; 3–7 in number. Lower glume surface flat, or concave. Upper glume lanceolate; chartaceous; 1-keeled. Upper glume muticous.

FLORETS Basal sterile florets barren; without significant palea. Lemma of lower sterile floret oblong; hyaline; 2 -veined. Fertile lemma oblong; hyaline; without keel. Lemma apex lobed; 2 -fid; incised 0.5 of lemma length; awned; 1 -awned. Principal lemma awn from a sinus; geniculate; 9–13 mm long overall; with twisted column. Column of lemma awn glabrous.

DISTRIBUTION Asia-tropical: India.

NOTES Andropogoneae. WDC.

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