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. 2018 Dec 20;6:e5992. doi: 10.7717/peerj.5992

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©2018 Rewicz et al.

This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, reproduction and adaptation in any medium and for any purpose provided that it is properly attributed. For attribution, the original author(s), title, publication source (PeerJ) and either DOI or URL of the article must be cited.

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(A) List of localities of the studied populations of E. helleborine: (B) A1—Guszczewina, (C) A2—Hajnówka, (D) A3—Sulejów 1, (E) A4—Sulejów 2, (F) N1—Kaczawskie Mt, (G) N2—Siechnice, (H) N3—Białowieża Primeval Forest 1, (I) N4—Białowieża Primeval Forest 2. (fot. A. Rewicz).