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Descriptions

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

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

Eriochrysis rangacharii

HABIT Perennial; caespitose. Culms erect; 12–30 cm long; 3 -noded. Culm-internodes distally glabrous, or pubescent. Culm-nodes bearded. Leaf-sheaths tight; pilose. Ligule a ciliolate membrane; obtuse. Leaf-blades flat, or involute; 10–21 cm long; 2–5 mm wide; stiff. Leaf-blade surface hirsute; hairy on both sides.

INFLORESCENCE Inflorescence composed of racemes. Peduncle pilose above.

Racemes 3–4; borne along a central axis; appressed; linear to oblong; 2–3 cm long. Central inflorescence axis 3–6 cm long. Rhachis fragile at the nodes; subterete; ciliate on margins. Rhachis hairs red. Rhachis internodes linear; 2.5 mm long. Rhachis internode tip clavate.

Spikelets in pairs. Fertile spikelets sessile and pedicelled; 2 in the cluster; the upper smaller. Pedicels linear; ciliate.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; 4–4.5 mm long, or 5.5–6.2 mm long; falling entire; deciduous from the base and with accessory branch structures. Spikelet callus bearded; base truncate. Spikelet callus hairs red; 2.2 mm long; 0.3–0.5 length of spikelet.

GLUMES Glumes dissimilar; exceeding apex of florets; firmer than fertile lemma. Lower glume elliptic; 1 length of spikelet; chartaceous; without keels. Lower glume surface flat; pubescent. Lower glume margins ciliate. Lower glume hairs red. Upper glume elliptic; chartaceous; 1-keeled. Upper glume margins ciliate. Upper glume apex acuminate.

FLORETS Basal sterile florets barren; without significant palea. Lemma of lower sterile floret oblong; 4–4.3 mm long; hyaline; ciliate on margins; obtuse, or acute. Fertile lemma linear, or lanceolate; 2–2.3 mm long; hyaline; without keel; 0 -veined. Lemma surface with conspicuous apical hairs. Lemma hairs 0.5–1 mm long. Palea absent or minute.

FLOWER Lodicules 2. Anthers 3; 2.7 mm long.

DISTRIBUTION Asia-tropical: India.

NOTES Andropogoneae. Fischer 1997.

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