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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 imbricata

HABIT Perennial; caespitose; clumped densely. Rootstock evident. Butt sheaths pubescent. Culms geniculately ascending; 23–50 cm long; wiry. Culm-nodes glabrous. Lateral branches fastigiate. Leaf-sheaths tight; longer than adjacent culm internode; glabrous on surface, or pilose; outer margin hairy. Ligule a fringe of hairs; 0.5–1 mm long. Leaf-blades straight, or curved, or flexuous; filiform; conduplicate; 4–9 cm long; 1–2 mm wide. Leaf-blade surface scabrous; rough adaxially; glabrous, or pilose; hairy abaxially. Leaf-blade margins cartilaginous; scabrous.

INFLORESCENCE Inflorescence a panicle.

Panicle spiciform; linear; 2.5–4 cm long; 0.3–0.5 cm wide. Panicle branches glabrous.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels 2–5 mm long.

FERTILE SPIKELETS Spikelets comprising 2 fertile florets; without rhachilla extension. Spikelets ovate; laterally compressed; compressed slightly; 5 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus 0.5 mm long; bearded; acute. Floret callus hairs 2 mm long.

GLUMES Glumes persistent; similar; exceeding apex of florets; thinner than fertile lemma. Lower glume lanceolate, or elliptic; 4–4.7 mm long; 1 length of upper glume; membranous; much thinner on margins; without keels; 9 -veined. Lower glume surface smooth, or asperulous; rough between veins. Lower glume apex acuminate. Upper glume lanceolate, or elliptic; 4–4.7 mm long; 0.8–0.9 length of adjacent fertile lemma; membranous; with hyaline margins; without keels; 9 -veined. Upper glume surface smooth, or asperulous; rough between veins. Upper glume apex acuminate.

FLORETS Fertile lemma lanceolate; laterally compressed; 5 mm long; chartaceous; much thinner on margins; without keel; 7 -veined. Lemma surface with 2 longitudinal grooves; pilose; hairy at base. Lemma margins involute. Lemma apex acute; without ornament, or scabrous; awned; 1 -awned. Principal lemma awn 3–4 mm long overall. Palea lanceolate; 6 mm long; coriaceous; 2 -veined. Palea keels ciliate. Palea surface glabrous, or pubescent. Palea apex dentate; 2 -fid; scaberulous.

FLOWER Anthers 3; 2.4 mm long.

FRUIT Caryopsis with adherent pericarp; oblong; 2.7–5 mm long; obtuse. Embryo 0.2–0.25 length of caryopsis.

DISTRIBUTION Australasia: Australia.

NOTES Eriachneae. Lazarides 1995.

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