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Descriptions

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

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

Eulalia phaeothrix

HABIT Perennial; caespitose; clumped densely. Butt sheaths pubescent, or woolly; with dark brown hairs. Culms erect; 30–80 cm long. Leaves mostly basal. Ligule a ciliolate membrane. Leaf-blades 18–30 cm long; 1–4 mm wide. Leaf-blade surface glabrous, or hirsute.

INFLORESCENCE Inflorescence composed of racemes. Peduncle pubescent above.

Racemes (1–)2–6(–8); digitate; 4–11 cm long. Rhachis fragile at the nodes; ciliate on margins. Rhachis internodes linear. Rhachis internode tip transverse.

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

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; 3.5–5 mm long; falling entire; deciduous from the base, or with accessory branch structures. Spikelet callus bearded; base obtuse; attached transversely.

GLUMES Glumes dissimilar; exceeding apex of florets; firmer than fertile lemma. Lower glume oblong; 1 length of spikelet; chartaceous; dark brown; 2-keeled; keeled above. Lower glume surface pilose. Lower glume hairs red. Lower glume apex truncate, or obtuse. Upper glume oblong; 1 length of spikelet; 1-keeled; 1 -veined. Upper glume primary vein ciliate. Upper glume lateral veins absent. Upper glume surface glabrous. Upper glume margins ciliate. Upper glume muticous.

FLORETS Basal sterile florets barren; without significant palea. Lemma of lower sterile floret oblong; 1 length of spikelet; 0 -veined; without midvein; without lateral veins; pilose; obtuse. Fertile lemma hyaline; without keel. Lemma apex lobed; 2 -fid; incised 0.5 of lemma length; awned; 1 -awned. Principal lemma awn from a sinus; geniculate; 10–15 mm long overall; with twisted column. Column of lemma awn glabrous. Palea absent or minute.

FLOWER Anthers 3.

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

NOTES Andropogoneae. WDC.

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