1. Croton aberrans Müller Argoviensis (1873: 232) .

Lectotype (designated by Sodré et al. 2019):— BRAZIL. Mato Grosso do Sul: “in campis arenosis secus Rio Pardo ”, September 1826, L. Riedel 546 (LE 00003045!; isolectotype G 00434413!). (Fig. 1, A–C)

Subshrub with hirsute indumentum. Young branches and leaves covered with stellate porrect trichomes; the porrect (central) ray much longer than the lateral rays. Inflorescences densely congested and axis reduced. The calyx of pistillate flowers is foliaceous and has 6 to 8 sepals. The species belongs to sect. Geiseleria subsect. Podostachys (Klotzsch 1841: 193) Müller Argoviensis (1865: 134) (Riina et al. 2021).

Distribution and habitat:— It occurs in Argentina, Bolivia and Brazil (GO, MG, MS, PR, RS, SC, SP) (Sodré et al. 2019, Caruzo et al. 2020, Riina et al. 2021). Subshrubs from ‘cerrado’, between 560 and 1000 m elevation. (Fig. 2).

Phenology:— Flowering from October to March, and fruiting in January.

Representative specimens:— BRAZIL. Paraná: Campo Mourão, Cerrado Valtra, 24°00’’52.04’ S, 52°21’47.02”W , 555 m, 19 October 2016, A. P. N . Pereira, F. S . Petrongari & O. L. M . Silva 29 (SP). Idem, 13 October 1965, G . Hatschbach 1953 (MBM). Idem, 17 March 2006, M. G . Caxambu 1104 (HCF). Guarapuava, Fazenda 3 Capões, 10 January 1984, G . Hatschbach 47331 (MBM) .