Croton thermarum Müller Argoviensis (1873: 151)

Pereira, Amanda Da Paixão Noronha, Riina, Ricarda & Caruzo, Maria Beatriz Rossi, 2022, Croton (Euphorbiaceae) of the Brazilian state of Paraná: an annotated checklist, species distribution, and identification key, Phytotaxa 570 (3), pp. 231-274 : 261

publication ID	https://doi.org/ 10.11646/phytotaxa.570.3.1
DOI	https://doi.org/10.5281/zenodo.7268618
persistent identifier	https://treatment.plazi.org/id/039887C6-9014-0469-FF44-FD8C29E786CF
treatment provided by	Plazi
scientific name	Croton thermarum Müller Argoviensis (1873: 151)
status

Treatment

35. Croton thermarum Müller Argoviensis (1873: 151) View in CoL .

Type: — BRAZIL. Minas Gerais: “prope Caldas, in campis juxta thermas”, 1847, A.F. Regnell 1084 (holotype G 00434665!; isotypes BR 0000008760623!, BR 0000008760654!, P 00623517!, S S07-12769!, S SR-10582!, US 00109775!, US 00902149!) . (Illustration available at Smith et al. 1988: 108)

Croton thermarum was synonymized under C. lanatus by Caruzo et al. (2020). We now disagree with that because although both species are morphologically similar, we have identified reproductive characteristics that permit their differentiation (see comments C. lanatus and Table 2 View TABLE 2 ). Therefore, we follow Caruzo et al. (2019), which recognize C. thermarum as an accepted species. The species is a member of section Adenophylli subsect. Meridionalis .

Distribution and habitat:— It occurs in southern (PR) and southeastern (MG, SP) Brazil ( Caruzo et al. 2019), where it grows in open vegetation, ‘capoeira’, and, frequently, edges of Araucaria Forest. It was registered for humid soil and rocky outcrops, between 600 and 1200 m elevation in Paraná ( Fig.18 View FIGURE 18 ).

Phenology:— Flowering from September to December, and fruiting from December to February.

Representative specimens:— PARANÁ: Guarapuava, Serra da Esperança , 09 November 2012, M. G . Caxambu et al. 4420 ( EFC, HCF, MBM, UEC). Imbituva, Rodovia BR-277, 05 December 1968, G . Hatschbach & O . Guimarães 20477 ( MBM, NY). Pitanga, Arroio Grande , 14 January 1983, G . Hatschbach 46015 ( MBM). Prudentópolis , 16 November 1957, G . Hatschbach 4314 ( MBM). Santa Maria do Oeste, Rodovia Pitanga – Santa Maria do Oeste, Rio Feio , 19 February 2004, G . Hatschbach, M . Hatschbach & E . Barbosa 76817 ( MBM, RB) .

M	Botanische Staatssammlung München
G	Conservatoire et Jardin botaniques de la Ville de Genève
EFC	Escola de Florestas
HCF	Universidade Tecnológica Federal do Paraná
MBM	San Jose State University, Museum of Birds and Mammals
UEC	Universidade Estadual de Campinas
O	Botanical Museum - University of Oslo
NY	William and Lynda Steere Herbarium of the New York Botanical Garden
E	Royal Botanic Garden Edinburgh
RB	Jardim Botânico do Rio de Janeiro