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Descriptions

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

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

Eremochloa bimaculata

HABIT Perennial; caespitose. Rootstock evident. Culms erect, or geniculately ascending; 30–60 cm long; 2–3 -noded. Culm-nodes glabrous, or bearded. Leaf-sheaths keeled. Ligule an eciliate membrane; 0.75–1 mm long. Leaf-blades conduplicate; 5–12 cm long; 2–3.5 mm wide. Leaf-blade margins tuberculate-ciliate; hairy at base. Leaf-blade apex abruptly acute.

INFLORESCENCE Inflorescence composed of racemes.

Racemes 1; single; arcuate; unilateral; 5–10 cm long. Rhachis fragile at the nodes; glabrous on surface; glabrous on margins. Rhachis internodes clavate; 2.5–3 mm long. Rhachis internode tip crateriform.

Spikelets appressed; in pairs. Fertile spikelets sessile; 1 in the cluster. Companion sterile spikelets pedicelled; 1 in the cluster. Pedicels narrowly elliptic; foliaceous; 3 mm long.

STERILE SPIKELETS Companion sterile spikelets represented by barren pedicels.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets oblong; dorsally compressed; compressed strongly; obtuse; 4–5 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus glabrous, or pilose; base truncate; with central boss; attached transversely.

GLUMES Glumes dissimilar; exceeding apex of florets; firmer than fertile lemma; shiny. Lower glume oblong; 1 length of spikelet; chartaceous; 2-keeled; winged on keel; winged narrowly; winged above; 7 -veined. Lower glume primary vein pectinately spinose. Lower glume surface flat. Upper glume oblong; chartaceous; 1-keeled; winged on keel; winged below; 3 -veined. Upper glume apex acute.

FLORETS Basal sterile florets male; with palea. Lemma of lower sterile floret elliptic; 3.5 mm long; hyaline; ciliate on margins; acute. Palea of lower sterile floret 1 length of lemma. Fertile lemma elliptic; 3–4 mm long; hyaline; without keel. Lemma apex obtuse. Palea 1 length of lemma; hyaline.

FLOWER Anthers 3; 2–3 mm long.

DISTRIBUTION Asia-temperate: China. Asia-tropical: Indo-China and Papuasia. Australasia: Australia.

NOTES Andropogoneae. Bor.

ADDITIONAL CHARACTERS Glume spines terete, 0.75mm.

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