Selaginella alstonii G. Heringer, Salino & Valdespino. A Section of upper surface of stem B Upper surface of median leaf C Section of lower surface of stem D Lower surface of lateral leaf. A–D taken from isotype, Almeida et al. 533 (PMA).

 
 
  Part of: Valdespino IA, Heringer G, Salino A, Góes-Neto LAA, Ceballos J (2015) Seven new species of Selaginella subg. Stachygynandrum (Selaginellaceae) from Brazil and new synonyms for the genus. PhytoKeys 50: 61-99. https://doi.org/10.3897/phytokeys.50.4873