Evolutionary divergence along two fronts (dashed arrows) in Euphorbia tithymaloides L. in the Caribbean has given rise to two incipient insular lineages from mainland populations (panel A) that exhibit morphological, ecological, and genetic differences: one occurring in the Greater Antilles (GA lineage; panel B), and one in the Lesser Antilles (LA lineage; panel C). Map is simplified to show the geographic distribution of these three focal forms (Mainland, Greater Antillean, and Lesser Antillean). All photographs by N. Ivalú Cacho.

 
 
  Part of: Piña-de la Rosa IA, López-Marmolejo C, Cacho NI (2024) Recent evolutionary divergence in a plant ring-species is not accompanied by floral phenology or pollinator shifts. Plant Ecology and Evolution 157(2): 158-173. https://doi.org/10.5091/plecevo.103095