4.21. Begonia pleiopetala A.DC., Ann. Sci. Nat. Bot. IV(11): 121 (1859). – Type: Peru,

Andibus, J. McLean s.n. (holotype K [K000252037]).

L. B. Smith & B. G. Schubert, Revista Univ. (Cuzco) 33(87): 83 (1944); R. C. Foster, Contr. Gray Herb. 184: 138 (1958) ; D. C. Wasshausen et al. in P. M. JØrgensen et al. (eds), Cat. Bolivia, Monogr. Syst. Bot. Missouri Bot. Gard. 129: 386 (2013) ; M. C. Tebbitt, Novon 23(4): 484 (2015) .

Begonia pusilla A.DC., Ann. Sci. Nat. Bot. IV (11): 120 (1859). – Type: Bolivia, [La Paz Department], Prov. Yungas, xii 1846, H.A. Weddell 4215 (lectotype G-DC ex P [photograph F#7327] designated in: Revista Univ. (Cuzco) 33(87): 78 (1944) by Smith, L.B. & Schubert, B.G.; isolectotype P [P00482207, photograph F#38530]).

Begonia tenuicaulis A.DC., Ann. Sci. Nat. Bot., IV(11): 120 (1859). – Type: Bolivia, [Prov. Larecaja-Franz Tamayo], Larecaja & Caupolicán, vallé entre Tipoani et Apolobamba, v 1847, H.A. Weddell 4592 (lectotype P [P00482211, photograph F#48533] designated in: Novon 23(4): 484 (2015) by Tebbitt, M.C.; isolectotype G-DC ex P).

D.C. Wasshausen et al. in P.M. JØrgensen et al. (eds), Cat. Bolivia, Monogr. Syst. Bot. Missouri Bot. Gard. 129: 386 (2013); M.C. Tebbitt, Novon 23(4): 484 (2015).

Begonia warburgiana Hieron., Bot. Jahrb. Syst. 21: 325 (1895). – Type: Bolivia, [La Paz Department], Illimani, entre Pongo y Apacheta, 3800 m, 17 xii 1876, A. Stübel 24b (lectotype B [B100186583, photograph F#20908] designated in: Revista Univ. (Cuzco) 33(87): 84 (1944) by Smith, L.B. & Schubert, B.G.).

R.C. Foster, Contr. Gray Herb. 184: 138 (1958); M.C. Tebbitt, Novon 23(4): 484 (2015).

Distribution. Peru and Bolivia.

Nomenclatural notes. Tebbitt (2015c) attempted to lectotypify Begonia pusilla A.DC. with the specimen H.A. Weddell 4215 (G-DC ex P). Smith & Schubert (1944a) had, however, already effected this lectotypification by citing the same specimen as the type. The earlier typification should be followed (see Article 9.19 of the Shenzhen Code; Turland et al., 2018). The same is true of Begonia warburgiana Hieron. (Hieronymus, 1895), which Tebbitt attempted to lectotypify based on A. Stübel 24b (B [B100186583]) but cited the same sheet and barcode as the isolectotype. This lectotypification was also effected by Smith & Schubert (1944a).

We note that Tebbitt (2015c) cited the type of Begonia gracillima A.DC. as a Bolivian collection. This specimen was collected by C. Gay, who collected only in Peru and Chile. It was collected in Peru, as indicated by the label, which clearly states ‘Pérou’. This name has not been applied in Bolivia, so we exclude it from this treatment.

Identification notes. See the Identification notes for Begonia marinae .