4. § Mimosa auriculata Benth

A very distinctive species with large glaucous foliaceous striate stipules and dilated paraphyllidia. Endemic to the rocky slopes and rupestral habitats of the Serranías Chiquitanas where it is locally abundant at Chochis and Santiago de Chiquitos. The type is from Santiago de Chiquitos, where it has been collected frequently in recent years, as well as further west on Cerro Pelón, near Chochis (J.R.I. Wood 16473, LPB, K).