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Descriptions

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

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

Eragrostis alveiformis

HABIT Perennial; caespitose. Culms 34–115 cm long; 2–3 -noded. Culm-internodes glandular. Leaf-sheaths glandular; glabrous on surface, or pilose. Ligule a fringe of hairs; 0.5 mm long. Leaf-blades 12–25 cm long; 1–2.5 mm wide; coriaceous. Leaf-blade surface scabrous; glabrous, or pilose; with tubercle-based hairs. Leaf-blade margins glandular.

INFLORESCENCE Inflorescence a panicle. Peduncle eglandular.

Panicle open; ovate; 11–47 cm long; 7–17 cm wide. Primary panicle branches 6–13.5 cm long. Panicle axis eglandular, or glandular. Panicle branches stiff; eglandular, or glandular.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels 1–3 mm long; eglandular.

FERTILE SPIKELETS Spikelets comprising 12–33 fertile florets; with diminished florets at the apex. Spikelets lanceolate, or ovate; laterally compressed; acute; 6.5–15.5 mm long; 1.6–2.5 mm wide; breaking up at maturity; rhachilla persistent; retaining paleas. Rhachilla internodes straight; 0.3–0.5 mm long; eventually visible between lemmas.

GLUMES Glumes deciduous; similar; shorter than spikelet. Lower glume linear, or ovate; 1.3–2.2 mm long; 1 length of upper glume; cartilaginous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume apex obtuse to acuminate. Upper glume lanceolate, or ovate; 1.3–2.2 mm long; 0.66–0.75 length of adjacent fertile lemma; cartilaginous; 1-keeled; 1 -veined. Upper glume lateral veins absent. Upper glume apex obtuse to acuminate.

FLORETS Fertile lemma oblong, or ovate; 2–2.6 mm long; cartilaginous; dark green; shiny; keeled; 3 -veined. Lemma surface scaberulous. Lemma apex obtuse. Palea elliptic, or oblanceolate; hyaline; 2 -veined. Palea keels thickened. Palea apex obtuse; ciliate. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Anthers 3; 0.5 mm long; retained within floret, or eventually exserted.

FRUIT Caryopsis with adherent pericarp; ellipsoid, or oblong; flattened; plano-convex; without sulcus; 0.8–1.2 mm long; red.

DISTRIBUTION Australasia: Australia.

NOTES Eragrostideae. Lazarides 1997.

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