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. 2017 Feb 10;9(1):plw083. doi: 10.1093/aobpla/plw083

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© The Authors 2017. Published by Oxford University Press on behalf of the Annals of Botany Company.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.

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Scanning electron microscopy of colleters in Apocynaceae. (A, D, E) Peplonia axillaris. (B) Asclepias curassavica. (C) Fischeria stellata. (F–H) Allamanda schottii. (I–K) Blepharadon bicuspidatum. (A) Stipular colleters. (B) Petiolar colleters. (C) Laminar colleters. (D) Colleters in the shoot apex. (E) Colleters secretion in the shoot apex. (F–K) Initiation of stipules from leaf primordia. (F, G, J) Projection of the stipules from leaf primordia base. (H) Colleters originated from stipules laterally to the petiole. (I) Leaf primordia without stipules. (K) Colleters origin from sheathing stipules. LP = leaf primordium. P = petiole. Narrow arrow = stipule. Large arrow = stipular colleter.