Mezcala - a new segregate genus of mimosoid legume (Leguminosae, Caesalpinioideae, mimosoid clade) narrowly endemic to the Balsas Depression in Mexico.

Recent results have demonstrated that the genus is non-monophyletic because the genus is nested within it, with a single species, placed as sister to the clade comprising plus the remaining species of . Here we transfer to a new segregate genus , discuss the morphological features supporting this new genus, present a key to distinguish from closely related genera in the Leucaena subclade, and provide a distribution map of .