Selaginella altheae Valdespino. A Section of upper surface of stem branch B Close-up of lateral leaf from stem branch, upper surface C Section of lower surface of stem branch D Close-up of lateral leaf (from branch), lower surface E Close-up of distal portion and apex of lateral leaf, lower surface (same leaf shown in B); note, elongate and papillate idioblasts (a) and stomata along midrib (b) F Close-up of proximal (basal) portion of lateral leaf, lower surface (same leaf shown in B); note, elongate and papillate idioblasts (a) and stomata along midrib (b). A–F taken from holotype, Maguire et al. 60249 (NY).