Lectotype:— PARAGUAY. ‘In regione fluminis Alto Paraná’, 1910, K.A.G. Fiebrig 6313 (lectotype G 00077059 (four sheets)! designated here, isolectotypes G 00085119!, G 00077060 (drawing)!, SI 001119!, B 100247909!, B 100247910!, GH 00068232!, US 00115309!).

Taxonomic notes:—De Candolle cited in the protologue of B. fiebrigii ‘ Alto Parana: K. Fiebrig n. 6313’. Two specimens and an illustration corresponding to Fiebrig 6313 were found in G. Then, we considering the lectotypifications proposals by Prado et al. (2015) for this case, because they indicate the fact that the types of many older names are syntypes (see Art. 9.5) not holotypes, and we chose the specimen G 00077059 as a lectotype for B. fiebrigii, because it is a complete specimen and coincides with the illustration accompanying the protologue. In addition, it bears the original label with the name of the species by De Candolle’s handwriting in 1913. The specimen chose as a lectotype (G 00077059) was mounted on four sheets and represents a unique specimen of this collection (Gautier et al. 2016).