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.