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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 wiseana

HABIT Perennial; caespitose; clumped densely. Culms 50–100 cm long. Culm-internodes distally glabrous. Leaf-sheaths without keel; glabrous on surface, or hirsute. Leaf-sheath oral hairs bearded; 3–5 mm long. Ligule a fringe of hairs. Leaf-blades aciculate; conduplicate; stiff; glandular. Leaf-blade venation without layer of subepidermal sclerenchyma masking vein striation. Leaf-blade apex pungent.

INFLORESCENCE Inflorescence a panicle.

Panicle open; linear, or oblong; 6–20 cm long. Panicle axis scabrous.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 5–9 fertile florets; with diminished florets at the apex. Spikelets lanceolate, or oblong; laterally compressed; 8–12 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus glabrous.

GLUMES Glumes persistent; similar; shorter than spikelet; thinner than fertile lemma. Lower glume lanceolate, or oblong; 4.5–5 mm long; 1 length of upper glume; scarious; 1-keeled; 3–5 -veined. Lower glume lateral veins obscure. Lower glume surface smooth, or asperulous. Lower glume apex obtuse to acuminate; muticous, or mucronate. Upper glume lanceolate, or oblong; 4.5–5 mm long; 1 length of adjacent fertile lemma; scarious; 1-keeled; 3–5 -veined. Upper glume lateral veins obscure. Upper glume surface smooth, or asperulous. Upper glume apex obtuse to acuminate; muticous, or mucronate.

FLORETS Fertile lemma lanceolate, or ovate; 4–6 mm long; coriaceous; without keel; 9 -veined. Lemma midvein ciliolate; hairy below. Lemma lateral veins in close groups (of 3). Lemma surface pubescent; hairy at base. Lemma margins ciliate; hairy below. Lemma apex lobed; 3 -fid; incised 0.25–0.33 of lemma length; acute. Palea 0.8 length of lemma. Palea keels winged; narrowly winged; eciliate. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Anthers 3.

DISTRIBUTION Australasia: Australia.

NOTES Eragrostideae. Burbidge 1993.

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