Monographs Details: Simira williamsii (Standl.) Steyerm.
Authority: Maguire, Bassett. 1972. The botany of the Guayana Highland--part IX. Mem. New York Bot. Gard. 23: 1-832.
Family:Rubiaceae
Discussion:

Sickingia williamsii Standi., Field Mus. Publ. Bot. 8: 340. 1931.