Seed morphology in Euphorbia and its taxonomic applications: a case study in Sao Paulo, Brazil

Seed morphology in Euphorbia and its taxonomic applications: a case study in Sao Paulo, Brazil

Author Marques da Silva, Otavio Luis Google Scholar
Cordeiro, Ines Google Scholar
Rossi Caruzo, Maria Beatriz Autor UNIFESP Google Scholar
Abstract Euphorbia L., with around 2000 species, is the biggest genus of Euphorbiaceae and one of the largest and most diverse genera within Angiosperms. It shows an almost cosmopolitan distribution and notable morphological diversity and is characterized by a pseudanthial inflorescence, the cyathium, which is unique to the genus. Along with its great morphological diversity in growth form, seed characters such as shape, testa ornamentation and presence or absence of caruncle are among its most notable and variable features. Given the potential utility of seed characters for species identification, we set to characterize the seeds from all known species (24) of Euphorbia occurring in the state of Sao Paulo, using photos and scanning electronic microscopy images. These species belong to three subgenera and seven sections of Euphorbia, and their morphological diversity is discussed in a phylogenetic context according to the most recent classification. Seed characters such as shape, size, testa ornamentation, and presence or absence of caruncle proved to be useful for identification of sections and for distinguishing closely related species.
Keywords Euphorbia subg. Chamaesyce
Euphorbia subg. Esula
Euphorbia subg. Euphorbia
Seed coat
Testa ornamentation
xmlui.dri2xhtml.METS-1.0.item-coverage Sao Paulo
Language English
Sponsor Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES)
Date 2016
Published in Brazilian Journal Of Botany. Sao Paulo, v. 39, n. 1, p. 349-358, 2016.
ISSN 1806-9959 (Sherpa/Romeo, impact factor)
Publisher Soc Botanica Sao Paulo
Extent 349-358
Access rights Open access Open Access
Type Article
Web of Science ID WOS:000373897100035

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