Abstract
A new species of Euphorbiaceae, Croton borbensis, is described and illustrated from western Amazonian Brazil. It shares features similar to another white sand Amazonian species, C. dissectistipulatus, but differs in having leaves with a serrulate-glandulose margin, no evident stipules, staminate flowers with six stamens and glabrous pedicels, pistillate flowers with few, shortly stipitate glands on the calyx, and a glabrous ovary. Croton borbensis is tentatively placed in section Barhamia.
Resumo
Uma nova espécie de Euphorbiaceae da Amazônia ocidental brasileira, C. borbensis, é descrita e ilustrada. Essa espécie é semelhante a C. dissectistipulatus, mas dela se diferencia por apresentar folhas com margem serrilhado-glandulosa, estípulas ausentes; flor estaminada com pedicelo glabro e seis estames; flor pistilada com os lobos do cálice com poucas glândulas curto-estipitadas e ovário glabro. Como tentativa, Croton borbensis é posicionado na seção Barhamia.
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Acknowledgments
We thank the Brazilian CNPq for the research grant to the senior author (award # 301342/2007-5) to study Amazonian Euphorbiaceae, Dr. William Rodrigues for aid with the Latin diagnosis, Mr. Carlos Alvarez for his fine illustration, and Dr. Anna Luiza Ilkiu-Borges, for assistance with the manuscript. We are also grateful to Dr. Inês Cordeiro and Dr. Benjamin van Ee for their helpful reviews of the manuscript.
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De S. Secco, R., Berry, P.E. Croton borbensis, a new species of Euphorbiaceae from white sands of Amazonian Brazil. Brittonia 62, 116–119 (2010). https://doi.org/10.1007/s12228-009-9104-x
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DOI: https://doi.org/10.1007/s12228-009-9104-x