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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 bicornuta

HABIT Perennial; caespitose. Butt sheaths persistent and investing base of culm; with fibrous dead sheaths. Culms erect; 50–100 cm long. Ligule an eciliate membrane. Leaf-blades flat, or convolute; 10–20 cm long; 2.5 mm wide. Leaf-blade surface pubescent; densely hairy; hairy adaxially. Leaf-blade apex acuminate; filiform.

INFLORESCENCE Inflorescence composed of racemes. Peduncle glabrous.

Racemes 2–3; digitate; 8–10 cm long. Rhachis fragile at the nodes; ciliate on margins. Rhachis internodes clavate; 3 mm long. Rhachis internode tip transverse.

Spikelets in pairs. Fertile spikelets sessile and pedicelled; 2 in the cluster. Pedicels linear; angular; 2.75 mm long; ciliate; hairy all along but hairs longer above; with 1.5 mm long hairs.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; 3.5–4 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 elliptic, or oblong; 1 length of spikelet; chartaceous; 2-keeled; keeled above; 2 -veined. Lower glume surface concave; pilose; hairy below. Lower glume apex dentate; 2 -fid. Upper glume oblong; 1 length of spikelet; 1-keeled; 3 -veined. Upper glume surface pilose; hairy below. Upper glume apex truncate; awned; 1 -awned. Upper glume awn 2–3 mm long.

FLORETS Basal sterile florets barren; with palea. Lemma of lower sterile floret oblong; 2.5 mm long; hyaline; 0 -veined; without midvein; without lateral veins; obtuse. Fertile lemma oblong; 2.5 mm long; hyaline; without keel; 1 -veined. Lemma apex lobed; 2 -fid; awned; 1 -awned. Principal lemma awn from a sinus; geniculate; 7–9 mm long overall; with twisted column. Column of lemma awn glabrous.

FLOWER Anthers 3; 2.25 mm long; purple.

DISTRIBUTION Asia-tropical: Indo-China.

NOTES Andropogoneae. Bor 1993.

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