Same uses as given for Senna hirsuta var. hirsuta:

Root: Tincture is rubbed onto rheumatic areas.

Leaf: Infusion is an effective remedy for renal calculi.

Robertt, A., et al.. Medicinal Plants of the Guianas (Guyana, Suriname, French Guyana)/Smithsonian NMNH. cited online: 17-08-2017.