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Descriptions

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

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

Eriachne vesiculosa

HABIT Perennial. Stolons absent, or present. Butt sheaths pubescent. Culms erect, or geniculately ascending; 30–90 cm long; 3–5 -noded. Culm-internodes terete. Culm-nodes bearded. Lateral branches fastigiate. Leaf-sheaths loose; glabrous on surface; outer margin hairy. Leaf-sheath oral hairs ciliate. Ligule a fringe of hairs; 0.3–0.5 mm long. Leaf-blades convolute; 15–30 cm long; 2–3 mm wide. Leaf-blade surface papillose; pilose, or hirsute; hairy on both sides. Leaf-blade margins cartilaginous; scabrous.

INFLORESCENCE Inflorescence a panicle. Peduncle glabrous, or pilose above.

Panicle open; oblong; 5–10.5 cm long; 1–3.5 cm wide. Panicle branches angular; scabrous; pilose; bearded in axils.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels 5–9 mm long.

FERTILE SPIKELETS Spikelets comprising 2 fertile florets; without rhachilla extension. Spikelets ovate; laterally compressed; compressed slightly; 6–9 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus 0.5–0.8 mm long.

GLUMES Glumes persistent; similar; shorter than spikelet; thinner than fertile lemma. Lower glume lanceolate, or elliptic; 6–9 mm long; 1 length of upper glume; cartilaginous; much thinner on margins; without keels; 7–9 -veined. Lower glume apex acuminate. Upper glume lanceolate, or elliptic; 6–9 mm long; 1.1–1.5 length of adjacent fertile lemma; cartilaginous; with membranous margins; without keels; 7–9 -veined. Upper glume apex acuminate.

FLORETS Fertile lemma elliptic; laterally compressed; 4–8 mm long; coriaceous; without keel; 5 -veined. Lemma surface with 2 longitudinal grooves; villous; hairy all along. Lemma margins involute. Lemma apex acute; scabrous; awned; 1 -awned. Principal lemma awn curved; 18–30 mm long overall. Palea elliptic; coriaceous; 2 -veined. Palea surface pilose. Palea apex dentate; 2 -fid; awned; awns 2–3 mm long.

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

FRUIT Caryopsis with adherent pericarp; obovoid; 2.5–3 mm long; obtuse.

DISTRIBUTION Australasia: Australia.

NOTES Eriachneae. Lazarides 1995.

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