Hedyotis nigricans (Lam.) Fosberg Hedyotis nigricans (Lam.) Fosberg in Lloydia 4: 287. 1941 sec. Borhidi 2006=Houstonia angustifolia var. scabra S. Watson in Proc. Amer. Acad. Arts 18: 97. 1883 syn. sec. Borhidi 2006