Abstract
We conducted fieldwork and herbarium research to investigate the morphological diversity, taxonomy, and geographic distribution of arborescent lineages of tribe Crotoneae (Euphorbiaceae) in the Brazilian Atlantic Rain Forest domain, a neotropical region considered one of the world’s hot spots of biodiversity. We found that arborescent lineages of Crotoneae are represented in the Atlantic Rain Forest by two genera (Croton and Brasiliocroton) and 23 species. Of this total, 70% of the species are endemic to the Atlantic Rain Forest. The genus Brasiliocroton, which is endemic to Brazil, includes two species, and Croton is represented by 21 species. We provide identification keys, update morphological description of key characters, include pertinent taxonomic comments, and illustrate most of the studied species with live photographs to facilitate taxonomic identification. The conservation status of each species is also evaluated. We establish five new synonyms, one superfluous name, and nine lectotypifications.
Similar content being viewed by others
References
Arévalo R, van Ee BW, Riina R, Berry PE, Wiedenhoeft AC (2017) Force of habit: shrubs, trees, and contingent evolution of wood anatomical diversity using Croton (Euphorbiaceae) as a model system. Ann Bot (Oxford) 119:563–579
Baillon H (1864) Euphorbiaceés Americaines. Adansonia 4:257–377
Berry PE, Hipp AL, Wurdack KJ, van Ee B, Riina R (2005a) Molecular phylogenetics of the giant genus Croton and tribe Crotoneae (Euphorbiaceae sensu stricto) using ITS and trnL–trnF DNA sequence data. Amer J Bot 92:1520–1534
Berry PE, Cordeiro I, Wiedenhoeft AC, Vitorino-Cruz MA, Lima LR (2005b) Brasiliocroton, a new crotonoid genus of Euphorbiaceae s.s. from eastern Brazil. Syst Bot 30:357–365
BFG - The Brazil Flora Group (2015) Growing knowledge: an overview of seed plant diversity in Brazil. Rodriguésia 66:1085–1113
Carneiro-Torres DS, Cordeiro I, Giulietti AM, Berry PE, Riina R (2011) Three new species of Croton (Euphorbiaceae s.s.) from the Brazilian Caatinga. Brittonia 63:122–132
Caruzo MBR (2005) Estudo Taxonômico e Biogeográfico do Gênero Croton L. (Euphorbiaceae) no Estado de São Paulo, Brasil. Universidade de São Paulo, São Paulo
Caruzo MBR, Cordeiro I (2007) Sinopse da tribo Crotoneae Dumort. (Euphorbiaceae s.s.) no Estado de São Paulo, Brasil. Hoehnea 34:571–585
Caruzo MBR, Cordeiro I (2013) Taxonomic revision of Croton section Cleodora (Euphorbiaceae). Phytotaxa 121:1–41
Caruzo MBR, Santos RF (2015) First record of Croton echinocarpus (Euphorbiaceae: Crotoneae) in São Paulo state, Brazil. Check List 11:1684
Caruzo MBR, Riina R, Cordeiro I, Berry PE (2008) Croton campanulatus (Euphorbiaceae s.s.), a new species from the Brazilian Atlantic rain forest. Brittonia 60:261–264
Caruzo MBR, Cordeiro I, Berry PE, Riina R (2010) A new species of Croton section Cleodora (Euphorbiaceae s.s.) from Minas Gerais, Brazil. Phytotaxa 3:27–33
Caruzo MBR, Silva OLM, Berry PE, Cordeiro I (2014) Nomenclatural novelties in Astraea (Euphorbiaceae). Phytotaxa 159:127–128
Caruzo MBR, Santos RFS, Feio AC, Meira RMSM, Riina R (2016) Redefinition of Croton macrobothrys (Euphorbiaceae), a tree species from the Brazilian Atlantic Forest, with the description of a new subspecies. Phytotaxa 273:51–58
Cordeiro I, Berry PE, Caruzo MBR, van Ee B (2008) Croton laceratoglandulosus (Euphorbiaceae s.s.), a new glandular-stipulate species from Brazil and Bolivia, and its systematic position based on molecular analysis. Bot J Linn Soc 158:493–498
Crepaldi CG, Campos JLA, Albuquerque UP, Sales MF (2016) Richness and ethnobotany of the family Euphorbiaceae in a tropical semiarid landscape of Northeastern Brazil. S African J Bot 102:157–165
Croizat L (1944) Additions to the genus Croton L. in South America. Darwiniana 6:442–468
Feio AC, Riina R, Meira RMSA (2016) Secretory structures in leaves and flowers of two Dragon’s blood Croton (Euphorbiaceae): new evidence and interpretations. Int J Pl Sci 177:511–522
Flora do Brasil 2020 (in construction). Jardim Botânico do Rio de Janeiro. Available at http://floradobrasil.jbrj.gov.br/. Accessed 02 Jan 2017
Font Quer P (1977) Diccionario de botánica. Lábor, Barcelona
Frodin DG (2004) History and concepts of big plant genera. Taxon 53:753–776
Govaerts R, Frodin DG, Radcliffe-Smith A (2000) World checklist and bibliography of Euphorbiaceae (and Pandaceae), 2. Royal Botanic Gardens, Kew
Hickey LJ (1973) Classification of the architecture of dicotiledonous leaf. Amer J Bot 60:17–33
IUCN (2012) The IUCN red list categories and criteria: version 3.1, 2nd edn. IUCN, Gland, Cambridge
Lima LR, Pirani JR (2008) Three new species of Croton (Euphorbiaceae) from Brazil. Kew Bull 63:121–129
Medeiros D, Valle LDS, Esser HJ, Alves RJV (2016) Floristic and taxonomic treatment of Croton subsect. Medea (Euphorbiaceae) from Brazilian campos rupestres. Phytotaxa 263:167–201
Müller Argoviensis J (1873) Euphorbiaceae. In: Martius CFP, Eichler AW (eds) Flora Brasiliensis. Munich, vol. 11(2):1–752
Oliveira-Filho AT, Fontes MAL (2000) Patterns of floristic differentiation among Atlantic forest in southeastern Brazil and the influence of climate. Biotropica 32:793–810
Olson DM, Dinerstein E, Wikramanayake ED, Burgess ND, Powell GVN, Underwood EC, D’Amico JA, Itoua I, Strand HE, Morrison JC, Loucks CJ, Allnutt TF, Ricketts TH, Kura Y, Lamoreux JF, Wettengel WW, Hedao P, Kassem KR (2001) Terrestrial ecoregions of the world: a new map of life on Earth. Bioscience 51(11):933–938
Radcliffe-Smith A, Govaerts R (1997) New names and combinations in the Crotonoideae. Kew Bull 52:183–189
Radford AE, Dickison WC, Massey JR, Bell CR (1974) Vascular plant systematics. Harper and Row Publishers, New York
Riina R, Cordeiro I, Amorim AM, Berry PE (2010) Croton thomasii Riina & P. E. Berry (Euphorbiaceae), a new species from the Atlantic Forest in the State of Bahia (Brazil) and typification of Croton sapiifolius Müll.Arg. Candollea 65:101–107
Riina R, Carneiro-Torres D, Peirson JA, Berry PE, Cordeiro I (2014) Further support for the Crotoneae phylogeny: a new species of Brasiliocroton (Euphorbiaceae) based on morphological, geographical, and molecular evidence. Syst Bot 39:227–234
Salatino A, Salatino MLF, Negri G (2007) Traditional uses, chemistry and pharmacology of Croton species (Euphorbiaceae). J Braz Chem Soc 18:11–33
Santos RF, Caruzo MBR (2015) Sinopse da tribo Alchorneae (Euphorbiaceae) no Estado de São Paulo, Brasil. Hoehnea 42:165–170
Santos RF, Riina R, Caruzo MBR (2016) Croton sapiifolius Müll. Arg: a new occurrence for the State of Espírito Santo, Brazil. Hoehnea 43:529–531
Secco R (2009) Uma nova espécie de Croton sect. Geiseleria (Euphorbiaceae) da Amazônia Oriental brasileira. Revista Brasil Bot 32:249–252
Secco R, Berry PE (2010) Croton borbensis, a new species of Euphorbiaceae from white sands of Amazonian Brazil. Brittonia 62:116–119
Secco RS, Cordeiro I, Senna-Vale L, Sales MF, Lima LR, Medeiros D, Sá-Haiad B, Oliveira AS, Caruzo MBR, Carneiro-Torres D, Bigio NC (2012a) An overview of recent taxonomic studies on Euphorbiaceae s.l. in Brazil. Rodriguésia 63:227–242
Secco R, Do Rosario AS, Berry PE (2012b) Croton campinarensis (Euphorbiaceae), a new species from eastern Amazonian Brazil. Phytotaxa 49:1–5
Silva SA, Sales MF, Gomes APS, Carneiro-Torres DS (2010) Sinopse das espécies de Croton L. (Euphorbiaceae) no estado de Pernambuco, Brasil. Acta Bot Brasil 24:441–453
Silva OLM, Cordeiro I, Caruzo MBR (2014a) Synopsis of Euphorbia (Euphorbiaceae) in the state of São Paulo, Brazil. Phytotaxa 181:193–215
Silva MJD, Sodré RC, Sales MFD (2014b) A new species of Croton L. (Euphorbiaceae ss) from the Brazilian Cerrado. Syst Bot 39:216–221
Smith LB, Downs RJ, Klein RM (1988) Euforbiáceas. In: Reitz R (ed) Flora ilustrada catarinense, pp 1–137
Stehmann JR, Forzza RC, Sobral M, Kamino LHY (2009) Gimnospermas e angiospermas. In: Stehmann JR, Forzza RC, Salino A, Sobral M, Costa DP, Kamino LHY (eds) Plantas da floresta Atlântica. Jardim Botânico do Rio de Janeiro, Rio de Janeiro
Thiers B (2016) Index Herbariorum, a global directory of public herbaria and associated staff. New York Botanical Garden’s Virtual Herbarium. Available at: http://sweetgum.nybg.org/ih/. Accessed 15 Mar 2016
van Ee BW, Riina R, Berry PE (2011) A revised infrageneric classification and molecular phylogeny of New World Croton (Euphorbiaceae). Taxon 60:791–823
Viana PL, Mota NFDO, Gil ADSB, Salino A, Zappi DC, Harley RM, Ilkiu-Borges AL, Secco RS, Almeida TE, Watanabe MTC, Santos JUMD, Trovó M, Maurity C, Giulietti AM (2016) Flora of the cangas of the Serra dos Carajás, Pará, Brazil: history, study area and methodology. Rodriguésia 67(5SPE):1107–1124
Vitarelli NC, Riina R, Caruzo MBR, Cordeiro I, Fuertes-Aguilar J, Meira RMSA (2015) Foliar secretory structures in Crotoneae (Euphorbiaceae): diversity, anatomy, and evolutionary significance. Amer J Bot 102:833–847
Vitarelli NC, Riina R, Cassino MF, Meira RMSA (2016) Trichome-like emergences in Croton of Brazilian highland rock outcrops: evidences for atmospheric water uptake. Perspect Pl Ecol Evol Syst 22:23–35
Webster GL, Del-Arco-Aguilar MJ, Smith BA (1996) Systematic distribution of foliar trichome types in Croton (Euphorbiaceae). Bot J Linn Soc 121:41–57
Wurdack KJ, Hoffmann P, Chase MW (2005) Molecular phylogenetic analysis of uniovulate Euphorbiaceae (Euphorbiaceae sensu stricto) using plastid rbcL and trhL-F sequences. Amer J Bot 92:1397–1420
Acknowledgements
This work is part of the Master thesis of RF Santos. We thank Amanda da Paixão Noranha Pereira, Daniela Carneiro-Torres and Otavio Luis Marques da Silva for providing photos of plants in the field. We are also grateful to all the herbaria cited for giving us access to their collections. Two anonymous reviewers made useful suggestions and corrections to improve an earlier version of this paper. Financial support was provided to MBR Caruzo (process 441049/2014-1) by “Conselho Nacional de Desenvolvimento Científico e Tecnológico” (CNPq).
Author information
Authors and Affiliations
Corresponding author
Ethics declarations
Conflict of interest
The authors declare that they have no conflict of interest.
Additional information
Handling editor: Mike Thiv.
Electronic supplementary material
Below is the link to the electronic supplementary material.
606_2017_1441_MOESM1_ESM.pdf
The “Online Resource 1″ in the ESM file (Santos_ESM_1) includes a list of the studied taxa with their taxonomic authorities, and all the herbarium specimens examined (main collector, collection number and specimen determination). (PDF 144 kb)
Electronic supplementary material
Electronic supplementary material
Online Resource 1. List of the studied taxa with their taxonomic authorities, and all the herbarium specimens examined (main collector, collection number and specimen determination).
Rights and permissions
About this article
Cite this article
dos Santos, R.F., Riina, R. & Caruzo, M.B.R. Diversity of arborescent lineages of Crotoneae (Euphorbiaceae) in the Brazilian Atlantic Rain Forest. Plant Syst Evol 303, 1467–1497 (2017). https://doi.org/10.1007/s00606-017-1441-8
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s00606-017-1441-8