Begonia leathermaniae O’Reilly & Kareg., 2022

Moonlight, Peter & Fuentes, Alfredo F., 2022, AN UPDATED CHECKLIST AND KEY TO THE SPECIES OF BOLIVIAN BEGONIA, INCLUDING ONE NEW SPECIES, Edinburgh Journal of Botany 79 (407), pp. 1-66 : 40

6.31. Begonia leathermaniae O’Reilly & Kareg. nom. nov. Begonian 50: 146, fig. s.n. [2] (1983).

– Begonia platanifolia var. acuminatissima Kuntze , Revis. Gen. Pl. 3(3): 106 (1898). – Type: Bolivia [Cochabamba Department], Santa Rosa, [17°18′S, 65°33′W], 2000 m, 1–4 iv 1892, C.E.O. Kuntze s.n. (lectotype NY [ NY00118642 ] designated here; isolectotypes B [ B100243080 , photograph F#20884 ], NY [ NY00118643 ]) .

L.B. Smith & B.G. Schubert, Revista Univ. (Cuzco) 33(87): 84 (1944); R.C. Foster, Contr. Gray Herb. 184: 138 (1958); M.C. Tebbitt, Begonian 79: 99 (2012); D.C. Wasshausen et al. in P.M. JØrgensen et al. (eds), Cat. Bolivia, Monogr. Syst. Bot. Missouri Bot. Gard. 129: 385 (2013).

Distribution. Endemic to Bolivia.

Nomenclatural notes. In his protologue of Begonia platanifolia var. acuminatissima Kuntze (1898: 106) , the author cited his own collections made at 2000 m elevation in Santa

Rosa in Bolivia. Smith & Schubert (1944a) cited material of a matching but unnumbered collection in the New York Botanical Garden herbarium as the type. There are two matching sheets in the herbarium, so Smith and Schubert’s citation effected the first stage of lectotypification. O’Reilly & Karegeannes (1983) later cited the same material in New York as the type of this name, and their new name and combination Begonia leathermaniae O’Reilly & Karegeannes (1983: 146) . We designate the sheet Kuntze s.n. (NY [NY00118642]) as the lectotype of Begonia platanifolia var. acuminatissima and B. leathermaniae . This sheet was chosen because it has a determination slip with this name written in Otto Kuntze’s handwriting.

Identification notes. Begonia leathermaniae is a distinctive species with more than five sinuous, deeply cut lobes on its leaf laminae. It may be confused with the superficially similar Begonia acerifolia but can be distinguished by the ring of hairs at its petiole apex.