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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 cremnophila
HABIT Perennial; caespitose; clumped densely. Stolons present. Culms erect, or geniculately ascending; 60–110 cm long; without nodal roots, or rooting from lower nodes. Culm-internodes scaberulous. Leaf-sheaths without exudate; hirsute. Leaf-sheath oral hairs ciliate. Leaf-sheath auricles erect. Ligule a fringe of hairs. Leaf-blade base with a false petiole; petiole 1.1–1.4 cm long. Leaf-blades conduplicate; 22–37 cm long; 0.8–1.1 mm wide; stiff; without exudate. Leaf-blade surface glabrous.
INFLORESCENCE Inflorescence composed of racemes.
Racemes borne along a central axis; unilateral; 5–10.5 cm long. Central inflorescence axis 27–38 cm long. Spikelet packing broadside to rhachis.
Spikelets solitary. Fertile spikelets pedicelled. Pedicels 1.5–7 mm long.
FERTILE SPIKELETS Spikelets comprising 4–5(–6) fertile florets; with diminished florets at the apex. Spikelets cuneate; laterally compressed; 4–6.1 mm long; 2.2–4.3 mm wide; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes elongated between glumes. Rhachilla elongation 0.4 mm long. Rhachilla internodes 0.8–0.9 mm long. Floret callus pilose. Floret callus hairs 0.5–1 mm long.
GLUMES Glumes persistent; similar; reaching apex of florets. Lower glume lanceolate; 3.4–5.1 mm long; 0.8 length of upper glume; cartilaginous; without keels; 1 -veined. Lower glume lateral veins absent. Lower glume surface asperulous. Lower glume apex acuminate; mucronate. Upper glume lanceolate; 4–6 mm long; 1–1.5 length of adjacent fertile lemma; membranous; without keels; 1 -veined. Upper glume lateral veins absent. Upper glume mucronate.
FLORETS Fertile lemma oblong; 3.6–3.9 mm long; coriaceous; keeled; lightly keeled; 3 -veined. Lemma surface pilose; hairy below. Lemma apex lobed; 3 -fid; with outer lobes shorter; with lobes 1.1–1.5 mm long; incised 0.25 of lemma length; awned; 3 -awned. Principal lemma awn 1.6–3 mm long overall. Lateral lemma awns arising on apex of lobes; shorter than principal. Palea lanceolate; 3 mm long; 2 -veined; 2-keeled. Palea keels thickened; wingless; adorned above. Palea surface pubescent; hairy on back; hairy below. Apical sterile florets resembling fertile though underdeveloped.
DISTRIBUTION Australasia: Australia.
NOTES Eragrostideae. Barrett 2011.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.
