TAXONOMY OF <italic>BEGONIA WOLLNYI</italic> HERZOG AND <italic>BEGONIA ARROGANS</italic> IRMSCH.

Descriptions of two sister species, <italic>Begonia wollnyi</italic> Herzog and <italic>Begonia arrogans</italic> Irmsch., are provided and their distributions mapped and discussed. <italic>Begonia wollnyi</italic> is newly recorded from Peru and Argentina. <italic>Begonia parodiana</italic> L.B.Sm. & B.G.Schub. is newly synonymised with <italic>B. wollnyi</italic>. <italic>Begonia arrogans</italic> Irmsch. and two existing synonyms of <italic>B. wollnyi</italic> Herzog, <italic>Begonia acrensis</italic> Irmsch. and <italic>Begonia williamsii</italic> Rusby & Nash, are lectotypified. <italic>Begonia wollnyi</italic> and <italic>B. arrogans</italic> are both assessed as Least Concern (LC), according to IUCN criteria. [ABSTRACT FROM AUTHOR]