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. 2013 Sep 10;8(9):e73355. doi: 10.1371/journal.pone.0073355

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© 2013 Pitzschke et al

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

PMC Copyright notice

Positions of plant species mentioned in the manuscript are indicated. The image was modified from the „Angiosperm Phylogeny Website – Missouri Botanical Garden“. Reprinted from http://www.mobot.org/MOBOT/research/APweb/ under a CC BY license, with permission from Peter F. Stevens, original copyright 2013. (http://www.mobot.org/MOBOT/research/APweb/).