Selaginella gioiae Valdespino. A Axillary leaf from stem branch, upper surface B proximal half of axillary leaf, upper surface (same leaf shown in A) C distal half of axillary leaf, upper surface (same leaf shown in A) D axillary leaf from stem branch, lower surface E proximal half of axillary leaf, lower surface (same leaf shown in D) F distal half of axillary leaf, lower surface (same leaf shown in D); note, elongate and papillate idioblasts (a) and stomata along midrib (b). A–F taken from the holotype.