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. 2014 Jun 25;5:284. doi: 10.3389/fpls.2014.00284

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Copyright © 2014 Dardick and Callahan.

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) or licensor 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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Examples of lignified endocarps in drupes after removal of exocarp and mesocarp. Seeds are contained inside and not shown (lower row is magnified for visibility). (1) Coconut, (2) mango, (3) Walnut, (4) Peach, (5) Apricot, (6) Olive, (7) Date, (8) Pistachio, (9) Blackberry, and (10) Cherry.