Gomphrena macrocephala A. Saint-Hilaire (1825: 32)

Bena, Maria Julia, 2017, Typification and nomenclatural notes on twenty-seven names of Gomphrena L. (Amaranthaceae) linked to the South American flora, Phytotaxa 296 (2), pp. 131-146 : 136-138

Gomphrena macrocephala A. Saint-Hilaire (1825: 32)

The protologue of Gomphrena macrocephala ( Saint-Hilaire 1825: 32) consists of a detailed diagnosis, plus the indication of some localities; moreover an illustration, which is to be considered as part of the original material, was provided.

De Siqueira (1992: 125) reported: “Tipo: “ Brèsil, Prov. Saint-Paul”: SAINT-HILAIRE C 2, 1291, 1816 a 1821 (P! isotipo)”. The use of the word “ isotipo ” (= isotype) is inappropiate since any holotype was indicated by Saint-Hilaire (1825). According to Art. 9.9, De Siquiera’s statement has to be corrected and interpreted as a lectotypification.

I also found one further sheet at P (code 00622656), which is part of the same gathering as the P specimens reported by De Siqueira (1992: 125).

According to Art. 9.17, De Siquiera’s designation should refer to one single specimen. I designate here the specimen P-00622655 as a second-step lectotype of Gomphrena macrocephala . The specimen P-00622656 is an isolectotype.