Croton (Euphorbiaceae) of the Brazilian state of Paraná: an annotated checklist, species distribution, and identification key Author Pereira, Amanda Da Paixão Noronha 0000-0003-4874-129X Instituto de Pesquisas Ambientais, Núcleo de Pesquisa Curadoria do Herbário, São Paulo, SP 01061 - 970, Brazil & Universidade Federal de São Paulo, Instituto de Ciências Ambientais, Químicas e Farmacêuticas, Departamento de Ecologia e Biologia Evolutiva, 09972 - 270, Diadema, SP, Brazil. & amanda. pnoronhap @ gmail. com; https: // orcid. org / 0000 - 0003 - 4874 - 129 X amanda.pnoronhap@gmail.com Author Riina, Ricarda 0000-0002-7423-899X Real Jardín Botánico (RJB), CSIC, Plaza de Murillo 2, 28014, Madrid, Spain. & rriina @ rjb. csic. es; https: // orcid. org / 0000 - 0002 - 7423 - 899 X rriina@rjb.csic.es Author Caruzo, Maria Beatriz Rossi 0000-0002-8393-214X Instituto de Pesquisas Ambientais, Núcleo de Pesquisa Curadoria do Herbário, São Paulo, SP 01061 - 970, Brazil & Universidade Federal de São Paulo, Instituto de Ciências Ambientais, Químicas e Farmacêuticas, Departamento de Ecologia e Biologia Evolutiva, 09972 - 270, Diadema, SP, Brazil. & mbrcaruzo @ unifesp. br; https: // orcid. org / 0000 - 0002 - 8393 - 214 X mbrcaruzo@unifesp.br text Phytotaxa 2022 2022-10-28 570 3 231 274 http://dx.doi.org/10.11646/phytotaxa.570.3.1 journal article 176492 10.11646/phytotaxa.570.3.1 e5151877-6fa0-44de-b9c3-4577de526c95 1179-3163 7260277 9. Croton didrichsenii Webster (1992: 271) . — Julocroton humilis Didrichsen (1857: 132) . Type:— BRAZIL . São Paulo : “campis Mugi ”, November 1833 , P.W. Lund s.n. ( holotype C 10011298 !; isotypes A 00277247 !, C 10011297 !, G 00312779 !). ( Fig. 5 , G–I) This subshrub can be recognized by its densely yellowish to ferrugineous indumentum, the presence of a xylopodium, congested inflorescences, and pinnatifid pistillate sepal. It shares several morphological characters with C. triqueter . However, C. didrichsenii is a subshrub found in ‘cerrado’, while C. triqueter is a shrub found mainly at the edge of forests. The species belongs to Croton sect. Julocroton ( van Ee et al. 2011 ) . Distribution and habitat:— It ocurrs in Argentina , Bolivia , Brazil ( BA , DF , GO , MG , MS , MT , PR , RS , SC , SP , TO), Paraguay , and Uruguay ( Caruzo & Cordeiro 2007 , Cordeiro 1990 , Caruzo et al. 2020 ). It is frequently found in open vegetation (‘campo limpo’ and ‘cerrado’), between 550 and 1050 m elevation. ( Fig. 6 ). Phenology:— Flowering and fruiting from September to March. Representative specimens:— PARANÁ : Campo Mourão , Cerrado Valtra , 24°00’’52.04’ S , 52°21’47.02”W , 555 m , 18 October 2016 , A . P . N . Pereira , F . S . Petrongari & O . L . M . Silva 30 ( SP ). Jaguariaíva , Parque Estadual do Cerrado , 05 November 1994 , A . Uhlmann 94 ( MBM , UPCB ). Idem , Lageado 5 Reis , 18 September 1975 , G . Hatschbach 37085 ( MBM ). Piraí do Sul , Rodovia PR-090, 10 km O do alto da Serra das Furnas , 12 January 2000 , G . Hatschbach , M . Hatschbach & J . M . Silva 69899 ( MBM ). Tibagi , Fazenda Monte Alegre , 16 September 1952 , G . Hatschbach 3078 ( MBM ) .