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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 condensata

HABIT Perennial; caespitose. Culms erect; 45–200 cm long. Leaf-sheaths outer margin hairy. Ligule a fringe of hairs. Collar pilose. Leaf-blades flat, or involute; 20–50 cm long; 3–10 mm wide. Leaf-blade surface scaberulous; rough adaxially; pilose; sparsely hairy; hairy adaxially.

INFLORESCENCE Inflorescence a panicle. Peduncle pilose above.

Panicle spiciform; linear; continuous, or interrupted; 18–65 cm long; 0.5–1.8 cm wide. Primary panicle branches appressed; 0.1–5.5 cm long. Panicle axis scaberulous; with scattered hairs, or glabrous. Panicle branches bearded in axils.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels 0.3–2.5 mm long; scaberulous.

FERTILE SPIKELETS Spikelets comprising 4–12 fertile florets; with diminished florets at the apex. Spikelets lanceolate, or oblong; laterally compressed; 3.4–7.3 mm long; 1.2–2.6 mm wide; breaking up at maturity; rhachilla persistent; retaining paleas. Rhachilla internodes glabrous, or pilose.

GLUMES Glumes deciduous; similar; shorter than spikelet. Lower glume ovate; 1–1.8 mm long; 0.9–1 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume primary vein smooth, or scaberulous. Lower glume lateral veins absent. Lower glume apex acute. Upper glume ovate; 1.2–1.5 mm long; 0.66–0.8 length of adjacent fertile lemma; membranous; 1-keeled; 1–3 -veined. Upper glume primary vein smooth, or scaberulous. Upper glume lateral veins absent, or obscure. Upper glume apex acute.

FLORETS Fertile lemma ovate; 1.7–2.9 mm long; membranous; grey; keeled; 3 -veined. Lemma midvein scaberulous. Lemma lateral veins obscure. Lemma apex acute. Palea bowed outwards; 1.6–2.7 mm long. Palea keels scaberulous. Palea apex obtuse. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 2; cuneate; fleshy. Anthers 3; 0.5–1.4 mm long; yellow, or purple.

FRUIT Caryopsis with adherent pericarp; obovoid; 0.5–0.9 mm long; smooth, or striate, or reticulate.

DISTRIBUTION South America: western South America.

NOTES Eragrostideae. Fl Ecuador 2002.

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