Peninha-Chamaecrista nictans subsp. patellaria var. ramosa Irwin & Barneby (Cassia patellaria D.C.) é usada na medicina popular para problemas renais a pedras nos rins. O estudo farmacognóstico desta planta foi feito a fim de identificar esta planta como droga.
Peninha (Chamaecrista nictans subsp. patellaria var.ramosa Irwin & Barneby) plant is considered a weed, but in folk medicine is used for kidney problems and renal calculi. The pharmacognostic study was made in order to identify the plant as a drug.