Croton ceanothifolius Baillon (1864: 295)

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 : 238

5. Croton ceanothifolius Baillon (1864: 295) .

Lectotype (first step designated by Lima & Pirani 2008b, second step designated here): — BRAZIL. Minas Gerais: ‘dans les capueiras’, 1816, A. Saint-Hilaire D-558 ( P 00493358 !; isolectotypes P 00493359!, P 00623093!) . Remaining syntype: — BRAZIL. Minas Gerais: ‘ass. comm. sur. les bords de l’Ouro-Preto’, 1816–1821, A. Saint-Hilaire B1-227 (P 00493360!) ( Fig. 3 , A–E).

Croton ceanothifolius is a very common shrub in Paraná. It has discolorous leaves, the adaxial leaf surface with stellate trichomes and the abaxial surface with stellate-lepidote trichomes. Leaf venation can be easily distinguished, and secondary veins are raised on the abaxial surface. The species belongs to sect. Lamprocroton subsect. Lamprocroton ( Müller Argoviensis 1873: 244) van Ee & Berry (2011: 93) .

Distribution and habitat:— It occurs in southern (PR, RS, SC) and southeastern Brazil (MG, SP) ( Caruzo & Cordeiro 2007, Caruzo et al. 2020). Frequent in habitats include open vegetation, edges of forest, riverbanks, rock outcrops or sandy soils, between 750 and 1200 m elevation. ( Fig. 4 ).

Phenology:— Flowering and fruiting throughout the year.

Representative specimens:— PARANÁ: Bocaiúva do Sul, Fazenda Serra do Putunã , 17 March 2005, J. M . Silva , L. M . Abe & F. F . Ramos 4294 ( MBM, RB). Curitiba, Boqueirão, 28 January 1975, L. F . Ferreira 194 ( MBM, MO). Palmeira, Cercado, 14 February 2006, E . Barbosa , J . Cordeiro , E. F . Costa & E. S . Pinto 1201 ( MBM, RB). Ponta Grossa, 25°10’15.1”S, 49°55’28.4”W, 1012 m, 16 October 2009, M. G . Caxambu & E. L . Siqueira 2745 ( HCF, MBM). União da Vitória , Bom Jesus, 753 m, 08 January 2016, A. P. N . Pereira & C. V . Ubinski 20 ( SP) .

Figures

FIGURE 3. Croton ceanothifolius. A. Habit. B. Staminate flowers. C. Pistillate flower with bifid styles. D. Leaf with impressed primary and secondary veins. E. Nearly mature capsules. C. celtidifolius. F. Habit (plant in the center with some orange leaves). G.Amber-colored latex. H. Stipules. I. Detail of acropetiolar stipitate nectary glands. J. Inflorescence with lower bisexual cymules. K. Pistillate flower with tetrafid styles. Photos: A.P.N. Pereira.

FIGURE 4. Map showing the known geographic distributions of Croton ceanothifolius, C. celtidifolius, C. chaetophorus, and C. chamaepitis in Paraná state.