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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 vella

HABIT Perennial; caespitose. Culms 100 cm long. Leaf-sheaths glabrous on surface. Leaf-sheath oral hairs pubescent. Ligule a fringe of hairs; 0.5–0.8 mm long. Leaf-blade base with a brief petiole-like connection to sheath; petiole 0.4–0.5 cm long. Leaf-blades filiform; conduplicate; 16–20 cm long; 0.8 mm wide; without exudate. Leaf-blade surface glabrous.

INFLORESCENCE Inflorescence a panicle.

Panicle open; linear; dense; 7.5–16 cm long; 0.5–1 cm wide. Primary panicle branches appressed; indistinct the panicle almost racemose, or simple; 1–2 cm long. Panicle branches angular, or flat.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels 1.5–7 mm long.

FERTILE SPIKELETS Spikelets comprising 3–6 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 6–10 mm long; 2–5 mm wide; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes elongated between glumes. Rhachilla elongation 0.3–0.5 mm long. Rhachilla internodes 1 mm long. Floret callus woolly; obtuse.

GLUMES Glumes persistent; similar; shorter than spikelet; thinner than fertile lemma. Lower glume linear, or oblong; 4–5 mm long; 1 length of upper glume; scarious; 1-keeled; keeled obtusely; 3 -veined. Lower glume surface asperulous. Lower glume apex obtuse. Upper glume linear, or oblong; 4–5 mm long; scarious; 1-keeled; 3 -veined. Upper glume surface asperulous. Upper glume apex obtuse.

FLORETS Fertile lemma lanceolate; 5 mm long; scarious; much thinner on margins; purple; without keel; 3 -veined. Lemma surface woolly; hairy below. Lemma apex entire; emarginate; muticous. Palea lanceolate; 1 length of lemma; scarious. Palea keels scaberulous; adorned above. Palea surface woolly; hairy on back and on flanks; hairy below. Palea apex obtuse. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 2; fleshy. Anthers 3; 2.8–3.3 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.