B. acrensisIrmscher, Bot. Jahrb. Syst. 74:605. 1949.—L.B. Smith & B.G. Schubert, J. Wash. Acad. Sci. 45:114. 1955.; B. williamsii Rusby & Nash. 1906, non B. x williamsii B. S. Williams. 1892.; —Revista Univ. (Cuzco) 33(87):84. 1944;
Reference
Repert. Spec. Nov. Regni Veg. 7:63. 1909; JGSL9/08; The Begonian, Aug 1970;
Article References
Tebbitt, Begonias 5:240-41. 2005;
Photo References
JBS, Begonias :70. 1980; Murotani, Begonia in Colour :168. 1983; Tebbitt, Begonias pl.206. 2005; The Begonian, Aug 1970;