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Descriptions

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

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

Triodia integra

HABIT Perennial; caespitose. Leaf-sheaths smooth, or scaberulous; glabrous on surface; outer margin hairy. Leaf-sheath oral hairs pubescent, or ciliate; erect, or curly; 3–5.5 mm long. Ligule a fringe of hairs; 1–1.3 mm long. Leaf-blades filiform, or linear; flat, or conduplicate; 9–15 cm long; 1–2 mm wide; without exudate. Leaf-blade surface hirsute.

INFLORESCENCE Inflorescence a panicle.

Panicle open; linear; dense; 14–19 cm long; 1–1.5 cm wide. Primary panicle branches 1–2 cm long.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels 2–15 mm long.

FERTILE SPIKELETS Spikelets comprising 11–18 fertile florets; with diminished florets at the apex. Spikelets lanceolate; laterally compressed; acuminate; 17–25 mm long; 3.5–5 mm wide; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes thickened; 0.5 mm long. Floret callus bearded.

GLUMES Glumes persistent; similar; shorter than spikelet; thinner than fertile lemma. Lower glume lanceolate; 7–8 mm long; 1 length of upper glume; cartilaginous; 1-keeled; 5 -veined. Lower glume lateral veins obscure. Lower glume surface smooth, or asperulous. Lower glume apex acuminate. Upper glume orbicular to oblate; 7–9 mm long; scarious; 1-keeled; 5 -veined. Upper glume lateral veins obscure. Upper glume surface smooth, or asperulous. Upper glume margins scaberulous; pubescent. Upper glume apex acuminate.

FLORETS Fertile lemma lanceolate; 7–8 mm long; cartilaginous, or indurate; much thinner on margins; shiny; without keel; 9 -veined. Lemma midvein ciliate; hairy below. Lemma lateral veins in close groups. Lemma surface smooth. Lemma margins scaberulous. Lemma apex dentate; 2 -fid; acuminate; mucronate. Principal lemma awn from a sinus; 1 mm long overall. Palea lanceolate, or elliptic; 0.5–0.66 length of lemma; hyaline. Palea keels winged; conspicuously winged; ciliate. Palea surface pubescent; hairy below. Palea apex dentate; 2 -fid; ciliate. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 2; fleshy. Anthers 3; 3 mm long.

FRUIT Caryopsis with adherent pericarp.

DISTRIBUTION Australasia: Australia.

NOTES Eragrostideae. Lazarides 1996.

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