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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.
Gymnopogon toldensis
HABIT Perennial. Rhizomes short. Culms 5–25 cm long. Leaf-sheaths striately veined; outer margin hairy. Leaf-sheath oral hairs ciliate. Ligule a ciliolate membrane; 0.6–0.8 mm long. Leaf-blades 0.8–5 cm long; 1.5–4.5 mm wide; stiff. Leaf-blade midrib indistinct. Leaf-blade margins scabrous.
INFLORESCENCE Inflorescence composed of racemes.
Racemes 4–6; borne along a central axis; spreading, or deflexed; arcuate, or flexuous; unilateral; 2.5–9 cm long. Central inflorescence axis 6–20 cm long. Rhachis angular; scabrous on surface. Spikelet packing broadside to rhachis; lax. Raceme-bases filiform; pilose; hairy in axils; with 1–1.3 mm long hairs.
Spikelets solitary. Fertile spikelets pedicelled. Pedicels 0.5–1.5 mm long; scabrous.
FERTILE SPIKELETS Spikelets comprising 2 fertile florets; with diminished florets at the apex. Spikelets lanceolate; laterally compressed; 4–6 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus 0.2 mm long; pubescent; hairy in 2 tufts.
GLUMES Glumes persistent; similar; exceeding apex of florets; gaping. Lower glume linear; (3–)3.5–4.8(–6.5) mm long; 0.75 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume primary vein scaberulous. Lower glume lateral veins absent. Lower glume apex acute, or acuminate. Upper glume linear; (4–)4.5–6(–7) mm long; 2 length of adjacent fertile lemma; membranous; 1-keeled; 1 -veined. Upper glume primary vein scaberulous. Upper glume lateral veins absent. Upper glume apex acute, or acuminate.
FLORETS Fertile lemma elliptic; 2.5–3 mm long; membranous; keeled; 3 -veined. Lemma surface scaberulous; rough above. Lemma margins ciliolate. Lemma apex dentate; 2 -fid; awned; 1 -awned. Principal lemma awn from a sinus; 18–26(–33) mm long overall. Palea 1 length of lemma. Palea keels scabrous; adorned above. Rhachilla extension 1.5 mm long. Apical sterile florets 1 in number; barren; rudimentary. Apical sterile lemmas awned; 1 -awned. Apical sterile lemma awns (4–)5–15(–18) mm long.
FLOWER Lodicules 2; cuneate; 0.25 mm long. Anthers 3; 0.8–0.9 mm long.
FRUIT Caryopsis with adherent pericarp; fusiform; concavo-convex; 1.8 mm long; light brown. Embryo 0.5 length of caryopsis. Hilum punctiform.
DISTRIBUTION South America: southern South America.
NOTES Cynodonteae. Sulekic & Rugolo 2009.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.
