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. 2018 Jun 6;19(6):1681. doi: 10.3390/ijms19061681

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© 2018 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Examples of complex morphologies of flowers. (a) Tecoma stans (Bignoniaceae); (b) Angaecum sesquipedale (Orchidaceae); (c) Impatiens balsamina (Balsaminaceae); (d) Lupinus pilosus (Fabaceae); (e) Ophrys alasiatica (Orchidaceae); (f) Salvia hierosolymitana (Lamiaceae); (g) Iris atropurpurea (Iridaceae); (h) Zingiber officinale (Zingiberaceae); (i) Calceolaria crenatiflora (Calceolariaceae); (j) Antirrhinum majus (Plantaginaceae). Photographers: (a) Calvin Finch; (b) Karole Schon; (d,i) Judith Marcus; (e) Michael Pettemerides; (f) Gideon Pisanty; (g) Ada Knossow; (h) Alastair Culham; (j) George Konstantinu.