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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 axillaris

HABIT Annual. Culms erect, or geniculately ascending; slender; 15–25 cm long; 6–7 -noded. Culm-internodes terete; smooth; distally glabrous. Culm-nodes pubescent. Lateral branches lacking. Leaf-sheaths tight; mostly shorter than adjacent culm internode; outer margin hairy. Leaf-sheath oral hairs ciliate. Ligule a fringe of hairs; 0.3 mm long. Leaf-blades straight; filiform; involute; 1–2.5 cm long; 1 mm wide. Leaf-blade surface scabrous. Leaf-blade margins cartilaginous; tuberculate-ciliate.

INFLORESCENCE Inflorescence a panicle; terminal and axillary. Axillary inflorescences present throughout the plant; different from terminal (smaller); enclosed.

Panicle open; ovate; 2–3 cm long; 1–2 cm wide. Primary panicle branches 0.4–0.8 cm long. Panicle branches glabrous; glabrous in axils; with prominent pulvini.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels 4–8 mm long.

FERTILE SPIKELETS Spikelets comprising 2 fertile florets; without rhachilla extension. Spikelets ovate; laterally compressed; compressed slightly; 3.5–4.3 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus 0.3–0.5 mm long; bearded; acute.

GLUMES Glumes persistent; similar; shorter than spikelet; thinner than fertile lemma. Lower glume elliptic; 3 mm long; 1 length of upper glume; membranous; much thinner on margins; without keels; 7–9 -veined. Lower glume apex acute; muticous, or mucronate. Upper glume elliptic; 3 mm long; 0.9 length of adjacent fertile lemma; membranous; with hyaline margins; without keels; 7–9 -veined. Upper glume apex acute; muticous, or mucronate.

FLORETS Fertile lemma elliptic; laterally compressed; 3.5–4.3 mm long; membranous; without keel; 5 -veined. Lemma surface villous; hairy below. Lemma margins involute; ciliate; hairy below. Lemma apex acute; mucronate, or awned; 1 -awned. Principal lemma awn 0.6–1 mm long overall. Palea 2 -veined. Palea surface pubescent; hairy at base. Palea apex entire.

FLOWER Lodicules 2. Anthers 3; 0.2–0.3 mm long; retained within floret.

FRUIT Caryopsis with adherent pericarp.

DISTRIBUTION Australasia: Australia.

NOTES Eriachneae. Lazarides 1995.

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