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Descriptions
W.D. Clayton, M. Vorontsova, K.T. Harman & H. Williamson
© Copyright The Board of Trustees, Royal Botanic Gardens, Kew.
Briza brasiliensis
HABIT Perennial; caespitose. Basal innovations extravaginal. Culms erect; 45–90 cm long; 2 -noded. Culm-nodes glabrous. Leaf-sheaths glabrous on surface. Ligule an eciliate membrane; 0.8–2 mm long. Leaf-blades flat, or involute; 6–25 cm long; 2–5 mm wide. Leaf-blade midrib keeled beneath. Leaf-blade surface ungrooved; glabrous.
INFLORESCENCE Inflorescence a panicle.
Panicle open; 13–20 cm long.
Spikelets solitary. Fertile spikelets pedicelled. Pedicels 1–4 mm long; glabrous.
FERTILE SPIKELETS Spikelets comprising 2–3 fertile florets; with diminished florets at the apex. Spikelets orbicular; laterally compressed; 2.5–3 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 0.2–0.3 mm long.
GLUMES Glumes persistent; similar; shorter than spikelet. Lower glume ovate; 2.1–2.9 mm long; 1 length of upper glume; membranous; 1-keeled; 3 -veined. Lower glume apex acute. Upper glume ovate; 2.1–2.9 mm long; 1–1.1 length of adjacent fertile lemma; membranous; 1-keeled; 3 -veined. Upper glume apex acute.
FLORETS Fertile lemma orbicular; 2–2.5 mm long; coriaceous; much thinner on margins; keeled; 5 -veined. Lemma apex obtuse. Palea elliptic; 1.7–2.3 mm long; coriaceous; 2 -veined. Apical sterile florets resembling fertile though underdeveloped.
FLOWER Lodicules 2; lanceolate; 0.4 mm long; membranous; acute. Anthers 1; 0.4 mm long. Ovary glabrous.
FRUIT Caryopsis with adherent pericarp; ovoid; trigonous; 1.4–1.5 mm long. Hilum punctiform.
DISTRIBUTION South America: Brazil.
NOTES Poeae. Mathei 1994.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.