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GrassBase - The Online World Grass Flora
Descriptions
W.D. Clayton, M. Vorontsova, K.T. Harman & H. Williamson
© Copyright The Board of Trustees, Royal Botanic Gardens, Kew.
Triodia claytonii
HABIT Perennial; caespitose; clumped densely. Culms erect; 60–75(–90) cm long; 2–3 -noded. Culm-internodes smooth. Lateral branches ample; arising from lower culm. Leaf-sheaths loose; without exudate. Leaf-sheath oral hairs ciliate. Ligule a fringe of hairs; 0.2 mm long. Leaf-blades filiform; conduplicate; 10–25 cm long; 1–2 mm wide; stiff; without exudate. Leaf-blade surface scabrous; rough adaxially. Leaf-blade margins scabrous. Leaf-blade apex pungent.
INFLORESCENCE Inflorescence a panicle.
Panicle contracted; linear; 9–14 cm long; 1–1.5 cm wide. Primary panicle branches 1–2.8 cm long.
Spikelets solitary. Fertile spikelets pedicelled. Pedicels 0.8–4 mm long.
FERTILE SPIKELETS Spikelets comprising 1 fertile florets; with diminished florets at the apex. Spikelets elliptic; laterally compressed; 6–7.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus glabrous; obtuse.
GLUMES Glumes persistent; similar; exceeding apex of florets; thinner than fertile lemma. Lower glume lanceolate; 6–7.5 mm long; 1.1–1.3 length of upper glume; membranous; without keels; 3 -veined. Lower glume surface asperulous; rough above. Lower glume apex acuminate. Upper glume lanceolate; 4.5–6.5 mm long; 2–2.5 length of adjacent fertile lemma; membranous; without keels; 3 -veined. Upper glume surface asperulous; rough above. Upper glume apex acuminate.
FLORETS Fertile lemma oblong; 2.3–2.5 mm long; coriaceous; without keel; 3 -veined. Lemma lateral veins obscure. Lemma surface pubescent. Lemma apex lobed; 3 -fid; awned; 3 -awned. Principal lemma awn 6–9 mm long overall. Lateral lemma awns arising on apex of lobes; 5–7 mm long; shorter than principal. Palea 2.2–2.5 mm long; coriaceous; thinner above; 2 -veined. Palea keels scaberulous; adorned above. Palea surface pubescent; hairy on back; hairy below. Palea apex with excurrent keel veins. Apical sterile florets 3 in number; barren; in a clump; rudimentary. Apical sterile lemmas awned; 3 -awned. Apical sterile lemma awns 3–7 mm long.
FLOWER Lodicules 2; fleshy. Anthers 3.
FRUIT Caryopsis with adherent pericarp.
DISTRIBUTION Australasia: Australia.
NOTES Eragrostideae. Lazarides.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.
