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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 jainii

HABIT Annual. Culms slender; 50–60 cm long. Culm-nodes glabrous. Leaf-sheaths 6–10 cm long; glabrous on surface. Ligule a ciliolate membrane; acute. Leaf-blade base with a false petiole; petiole 1–6 cm long. Leaf-blades lanceolate, or elliptic; 5–13 cm long; 15–30 mm wide. Leaf-blade surface pilose; sparsely hairy; hairy on both sides. Leaf-blade apex acuminate.

INFLORESCENCE Inflorescence a panicle with branches tipped by a raceme.

Panicle open; oblong; 8–10 cm long.

Racemes bearing few fertile spikelets. Rhachis fragile at the nodes.

Spikelets in pairs. Fertile spikelets sessile and pedicelled; 2 in the cluster; the upper smaller (3–3.5 mm). Pedicels clavate; 2–3 mm long; ciliate; hairy on margins; tip cupuliform.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets ovate; dorsally compressed; 3.5–4 mm long; falling entire; deciduous from the base, or with accessory branch structures. Spikelet callus inserted.

GLUMES Glumes dissimilar; exceeding apex of florets; firmer than fertile lemma. Lower glume ovate; 3.5–4 mm long; 1 length of spikelet; chartaceous; pallid; without keels; 5–7 -veined. Lower glume lateral veins ribbed. Lower glume surface pilose. Lower glume margins ciliate. Lower glume hairs purple; 2 mm long. Lower glume apex truncate. Upper glume ovate; 1 length of spikelet; chartaceous; pallid; without keels; 7 -veined. Upper glume lateral veins ribbed. Upper glume surface pilose. Upper glume hairs purple; 2 mm long. Upper glume apex acute; mucronate.

FLORETS Basal sterile florets male; with palea. Lemma of lower sterile floret ovate; 3 mm long; hyaline; ciliate on margins; fringed above; truncate. Palea of lower sterile floret 1.25 mm long. Fertile lemma oblong; 2.5 mm long; hyaline. Lemma apex dentate; 2 -fid; awned; 1 -awned. Principal lemma awn from a sinus; geniculate; 6–10 mm long overall; with twisted column. Palea obovate; 2 mm long; hyaline. Palea apex ciliate.

FLOWER Anthers 3; 3 mm long.

DISTRIBUTION Asia-tropical: India.

NOTES Andropogoneae. Nair 2004.

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