A New South Brazilian Species of Actinostemon (Euphorbiaceae)

A new species of Actinostemon is described and illustrated. Actinostemon roselii is mentioned only for the states of Paraná and Santa Catarina (Brazil), where it grows in riparian tropical rainforests. This species can be recognized by its conspicuous and depressed ovate bracts of the staminate cymu...

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Bibliographic Details
Published in:Systematic botany 2015-08, Vol.40 (2), p.522-526
Main Authors: Oliveira, Luciana dos Santos Dias de, Melo, André Laurênio de, Silva, Marcos José da, Eymael, Paula Pinto, Sales, Margareth Ferreira de
Format: Article
Language:English
Subjects:
Actinostemon Roselii
Atlantic Domain
bracts
buds
Discovery and exploration
ecology
Euphorbiaceae
flowers
Hippomaneae
IUCN
new species
plant taxonomy
Taxonomy
tropical rain forests
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Description
Summary:A new species of Actinostemon is described and illustrated. Actinostemon roselii is mentioned only for the states of Paraná and Santa Catarina (Brazil), where it grows in riparian tropical rainforests. This species can be recognized by its conspicuous and depressed ovate bracts of the staminate cymule, foliar buds globoid, staminate cymule with three or four flowers, and staminate and pistillate flowers monochlamydeous. Comments about its distribution and ecology are provided, as well as a key to identify the Brazilian species of Actinostemon. Based on IUCN criteria, A. roselii can be considered a data deficient (DD) species.
ISSN:0363-6445
1548-2324
DOI:10.1600/036364415X688709