Barrosoa betoniciformis ( DC.) King & Robinson (1971: 27)

Rebouças, Natanael Costa, Giacomin, Leandro Lacerda, Roque, Nádia & Bünger, Mariana De Oliveira, 2022, Typifications in Eupatorieae (Asteraceae), Phytotaxa 570 (3), pp. 289-294 : 290

2. Barrosoa betoniciformis ( DC.) King & Robinson (1971: 27) .

Conoclinium betoniciforme Candolle (1836: 135) .

Lectotype (designated here):— BRAZIL. Rio de Janeiro, accurate location not indicated, 1834, P.W. Lund 211 ( G00494203 [digital image!]) .

Candolle (1836) described Conoclinium betoniciforme based on the collection of naturalist Peter Wilhelm Lund; however, he did not specify which material he was referring to. In the herbarium of the Conservatoire et Jardin botaniques de Genève (G) there are two type specimens collected by P.W. Lund, with different collector numbers (s.n. and 211) and dates (1832 and 1834). So, these collections are not duplicates and should be treated as syntypes. Subsequently , King & Robinson (1971) described Barrosoa R.M. King & H. Rob. and proposed the new combination Barrosoa betoniciformis but did not indicate any typifications for the basionym. Due to this, we designate as lectotype P.W. Lund 211 (G00494203, Figure 2 ), given the material’s state of preservation, according to Art. 9.11 of the ICN. The material P.W. Lund s.n. (G 00494002) is treated as a residual syntype. An isolectotype and other syntype are possibly located in the Natural History Museum of Denmark herbarium (C), where most collections of P.W. Lund are housed, but these materials were not accessed.

Figures

FIGURE 2. Barrosoa betoniciformis (DC.) R.M. King & H. Rob. Lectotype, P.W. Lund 211 (G 00494203).