Begonia krystofii Halda, Acta Mus. Richnov. Sect. Nat.

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 : 12

1.6. Begonia krystofii Halda, Acta Mus. Richnov. Sect. Nat. 14: 110, t. II–V (2007). – Type:

Bolivia, Chuquisaca Department, Wet vertical Rocks near Nuevo Mundo , [18°59′S, 64°18′W], 1750 m, J. J. Halda JJH7112003 (holotype PR) .

D.C. Wasshausen et al. in P.M. JØrgensen et al. (eds), Cat. Bolivia, Monogr. Syst. Bot. Missouri Bot. Gard. 129: 385 (2013); M.C. Tebbitt, Tuberous Begonias, a Monograph of Begonia sect. Australes 91 (2020).

Distribution. Endemic to Bolivia.

Identification notes. Begonia krystofii is the only yellow-flowered, tuberous species of Bolivian Begonia with a dense indumentum of white hairs on the leaf underside. These hairs turn red brown when handled (Tebbitt, 2020). It is also highly unusual among tuberous Begonia species in its unisexual inflorescences; however, this character should be used with care because most tuberous Begonia species are protandrous so may appear unisexual when young.