Croton (Euphorbiaceae) of the Brazilian state of Paraná: an annotated checklist, species distribution, and identification key Pereira, Amanda Da Paixão Noronha Riina, Ricarda Caruzo, Maria Beatriz Rossi Phytotaxa 2022 2022-10-28 570 3 231 274 ZQYG Smith & Downs (1959: 152) Smith & Downs 152 1959 [182,688,1454,1481] Magnoliopsida Euphorbiaceae Croton Plantae Malpighiales 25 256 Tracheophyta species reitzii   Type: — BRAZIL. Santa Catarina: Canoinhas,  19 kmao oeste de Canoinhasno caminho para Porto União,  17 December 1956,  L.B. Smith & R. Reitz8590( holotype US 2249814!; isotypes K 000254430!, NY 00262942!, R 000200949!, UC 1079899!). (Illustration available in Smith et al.1988, p. 100)  Due to its congested inflorescences and dense indumentum, this shrub may resemble members of  Crotonsect. Julocroton, which justifies the comparison made by Smith & Downs (1959)with  C. calocephalus Müller Argoviensis (1865:121). However,  C. reitziican be distinguished from all species in section  Julocrotonby its leaves with basilaminar nectary glands and its inflated, trilobed columella (both characters absent in sect.  Julocroton). Collections of  C. reitziihave been misidentified in some herbaria as  C. lanatus, but they can be differentiated by several vegetative and reproductive characters (see under  C. lanatusand Table 2).  Croton reitziibelongs to section  Adenophyllisubsect. Meridionalis( van Ee & Berry 2021).   Distribution and habitat:—It occurs in southern ( PR, RS, SC) and southeastern (SP) Brazil( Smith et al.1988, Caruzo et al.2020), where it grows in borders of Araucaria forest, rarely in open vegetation, between 475 and 1155 melevation. ( Fig. 14).   Phenology:—Flowering and fruiting throughout the year, except August.   Material selected:—  PARANÁ: Dois Vizinhos, campus da UTFPR,   10 November 2007,  E .  L.   Siqueira91( HCF, MBM). Campo Mourão, Parque Estadual do Lago Azul,  03 March 2007,  A .  R.   Silva276( HCF, RB). Campo Largo, Serra São Luís do Purunã,  07 April 1946,  G .   Hatschbach263( MBM). Castro, Parque Estadual do Caxambu,  05 November 1988,  R .  M.   Britez2045( MBM). Florestópolis, arredores,  22 July 2001,  J .   Carneiro1129( MBM). 3948786735 1956-12-17 US L. B. Smith & R. Reitz Brazil Canoinhas Canoinhas 25 256 2249814 1 Santa Catarina holotype 3948786372 [431,949,2030,2059] UTFPR Dois Vizinhos PARANA 25 256 1 Parana 3948786596 [960,1212,2030,2056] 2007-11-10 E 25 256 1 PARANA 3948786693 [1216,1235,2031,2056] 2007-11-10 L true 25 256 1 PARANA 3948786602 2007-03-03 HCF, MBM, A Siqueira Parque Estadual do Lago Azul Campo Mourao 25 256 1 PARANA 3948786717 [1001,1021,2067,2093] 2007-03-03 R Siqueira true Parque Estadual do Lago Azul Campo Mourao 25 256 1 PARANA 3948786431 1946-04-07 HCF, RB, G Silva 26 257 Serra Sao Luis do Puruna Campo Largo 25 256 1 PARANA 3948786351 1988-11-05 MBM, R Hatschbach Parque Estadual do Caxambu Castro 26 257 1 PARANA 3948786410 [354,382,195,220] 1988-11-05 M Hatschbach true Parque Estadual do Caxambu Castro 26 257 1 PARANA 3948786429 [393,1084,194,220] 2001-07-22 MBM, J Britez Florestopolis 26 257 1 PARANA 3948786455 [1094,1354,194,221] MBM Carneiro 26 257 1 PARANA