GrassBase - The Online World Grass Flora


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

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

Eulaliopsis binata

HABIT Perennial; caespitose. Butt sheaths woolly; persistent and investing base of culm; with compacted dead sheaths. Culms erect; 60–90 cm long. Culm-nodes glabrous, or bearded. Leaf-sheath oral hairs bearded. Ligule a fringe of hairs. Leaf-blades flat, or convolute; 30–60 cm long; 2–3 mm wide; stiff.

INFLORESCENCE Inflorescence composed of racemes; terminal and axillary. Axillary inflorescences present throughout the plant; similar to terminal.

Racemes 2–4; digitate; 2–4 cm long. Rhachis fragile at the nodes; flattened. Rhachis internodes linear; 1.75–2.25 mm long. Rhachis internode tip oblique.

Spikelets in pairs. Fertile spikelets sessile and pedicelled; 2 in the cluster. Pedicels linear; flattened; 1.75–2.25 mm long.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; 3.5–4.5 mm long; falling entire; deciduous from the base, or with accessory branch structures. Spikelet callus bearded. Spikelet callus hairs dark brown; 0.25–0.5 length of spikelet.

GLUMES Glumes dissimilar; exceeding apex of florets; firmer than fertile lemma. Lower glume elliptic; 1 length of spikelet; chartaceous; pallid; without keels; 5 -veined. Lower glume lateral veins ribbed. Lower glume surface villous; hairy below. Lower glume apex dentate; 2–3 -fid. Upper glume lanceolate; chartaceous; without keels; 3–5 -veined. Upper glume primary vein scabrous. Upper glume surface villous; hairy below. Upper glume apex dentate; 2 -fid; mucronate, or awned; 1 -awned. Upper glume awn 0–2.5 mm long.

FLORETS Basal sterile florets male; with palea. Lemma of lower sterile floret oblong; hyaline; 0 -veined; without midvein; without lateral veins; dentate; 2 -fid. Fertile lemma linear; 3.4–4.3 mm long; hyaline; without keel; 1 -veined. Lemma apex dentate; 2 -fid; awned; 1 -awned. Principal lemma awn from a sinus; geniculate; 6–9 mm long overall; with a straight or slightly twisted column. Palea obovate; 0.7 length of lemma; hyaline. Palea apex ciliate.

FLOWER Anthers 3; 2 mm long.

DISTRIBUTION Asia-temperate: western Asia, China, and eastern Asia. Asia-tropical: India, Indo-China, and Malesia.

NOTES Andropogoneae. Bor.

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