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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 quadrinervis

HABIT Perennial; caespitose. Butt sheaths glabrous. Culms 50–100 cm long. Leaf-sheaths glabrous on surface, or pilose. Ligule a ciliolate membrane. Leaf-blades 10–20 cm long; 2–3 mm wide. Leaf-blade surface scaberulous; rough adaxially; pilose; sparsely hairy; hairy on both sides. Leaf-blade apex acuminate; filiform.

INFLORESCENCE Inflorescence composed of racemes. Peduncle glabrous, or pubescent above.

Racemes 3–6; digitate; 6–12 cm long. Rhachis fragile at the nodes; subterete; pilose on surface; villous on margins. Rhachis hairs yellow. Rhachis internodes linear; 3 mm long. Rhachis internode tip transverse.

Spikelets in pairs. Fertile spikelets sessile and pedicelled; 2 in the cluster. Pedicels linear; angular; 3 mm long; villous; with yellow hairs.

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

GLUMES Glumes dissimilar; exceeding apex of florets; firmer than fertile lemma. Lower glume elliptic; 1 length of spikelet; cartilaginous; 2-keeled; keeled above; 4 -veined. Lower glume surface flat; pilose; hairy below. Lower glume apex acuminate. Upper glume lanceolate; 1-keeled; 3 -veined. Upper glume surface pilose; hairy below. Upper glume apex dentate; 2 -fid; mucronate.

FLORETS Basal sterile florets barren; without significant palea. Lemma of lower sterile floret linear; 4 mm long; hyaline; ciliate on margins. Fertile lemma lanceolate; 3 mm long; hyaline; without keel. Lemma margins ciliolate. Lemma apex lobed; 2 -fid; incised 0.5 of lemma length; awned; 1 -awned. Principal lemma awn from a sinus; geniculate; 30 mm long overall; with twisted column. Column of lemma awn hispidulous. Palea hyaline.

FLOWER Anthers 3.

FRUIT Caryopsis with adherent pericarp.

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

NOTES Andropogoneae. Gilliland 1993.

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