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. 2019 Apr 24;10:518. doi: 10.3389/fpls.2019.00518

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Copyright © 2019 Cassola, Nunes, Lusa, Garcia and Mayer.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Distribution of the colleters (arrows) and secretion in the floral organs of E. brasiliensis. (A,C,E) Light microscopy. (B,D,F–H) Scanning electron microscopy. (A–D) Bracteole covered by a large amount of secretion (arrowheads). (C,D) Magnified detail of the colleters (“Col” and white arrows) involved in secretion. (E,F) Sepals presenting colleters and a lower amount of secretion. (G) Ovarian wall showing colleters. (H) Floral column with colleters on the surface. BLE, bracteole; COL, floral column; OVA, ovary; PET, petal; SEP, sepal.