Published October 28, 2022 | Version v1
Taxonomic treatment Open

Croton chaetophorus Muller Argoviensis 1865

  • 1. 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
  • 2. Real Jardín Botánico (RJB), CSIC, Plaza de Murillo 2, 28014, Madrid, Spain. & rriina @ rjb. csic. es; https: // orcid. org / 0000 - 0002 - 7423 - 899 X
  • 3. 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

Description

7. Croton chaetophorus Müller Argoviensis (1865: 130).

Lectotype (designated here): BRAZIL. “Brasilia meridionalis”, s.d., F. Sellow s.n. (BR 0000008765802!); idem, F. Sellow s.n. (original syntype B†). Remaining syntypes: BRAZIL. Minas Gerais:“ad Caldas”, September, A.F. Regnell I 398 (A 00257902!, B†, BR 0000006993894!, BR 0000006994525!, G 00434438!, MEL 2324385!, P 00623099!, P 00623100!, S-R-10502!, US 01050272); s. loc., L. Riedel s.n. (B†). (Fig. 5, A–F)

Croton chaetophorus is a subshrub with pistillate sepals covered by glands (apparently colleters), except at the base, which is a useful character for its identification. Bracts are lanceolate-rhombic and, due to their morphology, they totally cover the flower buds. The species can be confused with C. serratifolius, however, the bracts and stipules of C. chaetophorus do not have glands, its leaves are ovate to ovate-lanceolate, whereas, in C. serratifolius, bracts and stipules have glands along the margin, and the leaves are elliptic to oblong. The species is a member of Croton sect. Barhamia subsect. Medea (van Ee et al. 2011).

Distribution and habitat:— It occurs in southern (PR, SC) and southeastern (MG, SP) Brazil (Smith et al. 1988, Caruzo et al. 2019). Plants grow in open vegetation (‘campos sujos’), edges of forest and, rarely, in ‘banhados’, between 980 and 1090 m elevation (Fig. 2).

Phenology:— Flowering and fruiting from October to February.

Representative specimens:— PARANÁ: Clevelandia, 21 November 1972, G. Hatschbach 30807 (MBM). Jaguariaíva, Estrada para acesso ao Parque Estadual do Cerrado, 21 October 2016, A. P. N. Pereira, F. S. Petrongari & O. L. M. Silva 40 (SP). Ortigueira, Rio Capivary Grande, 17 October 1965, G. Hatschbach 13038 (K, MBM, P). Prudentópolis, Relógio, 11 April 1965, G. Hatschbach 12524 (MBM). Turvo, Vegetação Ciliar do Rio Turvo, 25°02’40.1” S, 51°32’50.1” W, M. G. Caxambu 2601 (HCF, MBM).

Notes

Published as part of 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, pp. 231-274 in Phytotaxa 570 (3) on pages 240-242, DOI: 10.11646/phytotaxa.570.3.1, http://zenodo.org/record/7260277

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Additional details

Biodiversity

References

  • Muller Argoviensis, J. (1865) Euphorbiaceae. Vorlaufige Mittheilungen aus dem fur De Candolle's Prodromus bestimmten Manuscript uber diese Familie. Linnaea 34: 1 - 224.
  • van Ee, B. W., Riina, R. & Berry, P. E. (2011) A revised infrageneric classification and molecular phylogeny of New World Croton (Euphorbiaceae). Taxon 60: 791 - 823. https: // doi. org / 10.3372 / wi. 41.41102
  • Smith, L. B., Downs, R. J. & Klein, R. M. (1988) Euforbiaceas. In: Reitz, R. (Ed.) Flora Ilustrada Catarinense. Herbario Barbosa Rodrigues, Itajai, Santa Catarina, pp. 62 - 137.
  • Caruzo, M. B. R., Pereira, A. P. N. & Cordeiro, I. (2019) Croton (Euphorbiaceae) in the State of Sa t o Paulo, Brazil: an update. Hoehnea 46: e 912018. http: // dx. doi. org / 10.1590 / 2236 - 8906 - 91 / 2018