Publicación:
Four New Species of Dragon's Blood Croton (Euphorbiaceae) from South America
Four New Species of Dragon's Blood Croton (Euphorbiaceae) from South America
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Fecha
2018
Autores
Feio A.C.
Ore-Rengifo M.I.
Berry P.E.
Riina R.
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Editor
American Society of Plant Taxonomists Inc.
Proyectos de investigación
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Abstracto
We describe and illustrate four new species of dragon’s blood trees (Croton sect. Cyclostigma) from western South America. Three of the species,
Croton beckii from Bolivia and Peru,C. camposii from Peru, andC. santamartensis from Colombia, grow in montane Andean forest, whereasC. tumbesinus
occurs in dry forest of the Tumbes/Piura ecoregion of western Ecuador and Peru. The characters that place them in Croton sect. Cyclostigma include the
arborescent habit, the presence of reddish to yellowish latex, an indument of stellate trichomes, conspicuous and persistent stipules, acropetiolar/basilaminar
nectary glands, and terminal inflorescences with bisexual cymules at the base. These new species give additional support for the Andean region being the
main center of diversity of this Neotropical Croton clade, as well as being a region whose biodiversity knowledge is still incomplete.
Descripción
We are grateful to the staff of the abovementioned herbaria for allowing us to examine specimens from their collections. Christine Niezgoda (F) and Alfredo F. Fuentes (LPB) kindly sent us specimen images. We are grateful to Otavio M. L. da Silva for assistance with the QGIS software. ACF was supported by a CNPq research grant and the Programa de Capacitaç~ao Institucional (MPEG/ MCTIC). MIOR was supported by a mobilization scholarship from the National Fund for Scientific Development, Technological and Technological Innovation-FONDECYT, CONCYTEC (Lima, Peru), for a two-month internship at the RJB-CSIC in 2017. RR received support from the Synthesys Programme (GBTAF-2834). Three reviewers and the editors provided valuable comments and suggestions to improve earlier versions of this manuscript.
Palabras clave
Andes,
Crotoneae,
diversity,
dry forest