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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.
Trisetum juergensii
HABIT Perennial. Culms erect; 30–70 cm long; 6 -noded. Lateral branches lacking, or sparse. Leaf-sheaths mostly shorter than adjacent culm internode. Ligule an eciliate membrane; 2–3 mm long; obtuse. Leaf-blades 4–5 cm long; 1.5 mm wide; coriaceous; stiff. Leaf-blade apex acuminate.
INFLORESCENCE Inflorescence a panicle.
Panicle spiciform; linear; 7–10 cm long; 0.7–1 cm wide.
Spikelets solitary. Fertile spikelets pedicelled.
FERTILE SPIKELETS Spikelets comprising 2 fertile florets; with a barren rhachilla extension. Spikelets lanceolate, or oblong; laterally compressed; 6 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes definite. Floret callus pubescent.
GLUMES Glumes persistent; similar; exceeding apex of florets; similar to fertile lemma in texture. Lower glume lanceolate; 6 mm long; 1 length of upper glume; membranous; 1-keeled. Lower glume apex acute. Upper glume lanceolate; 6 mm long; 2.5 length of adjacent fertile lemma; membranous; 1-keeled. Upper glume apex acute.
FLORETS Fertile lemma lanceolate; 6 mm long; membranous; without keel; 5 -veined. Lemma apex dentate; 2 -fid; awned; 1 -awned. Principal lemma awn dorsal; arising 0.25 way up back of lemma; geniculate; 4 mm long overall; with twisted column.
FLOWER Lodicules 2; membranous. Anthers 3.
FRUIT Caryopsis with adherent pericarp. Hilum punctiform.
DISTRIBUTION South America: Brazil.
NOTES Aveneae. Fl Cat 2000.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.