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Mostrando ítems 61-70 de 191
Sesquiterpenes Lactones and Flavonoids from Eremanthus argenteus (Asteraceae)
(NATURAL PRODUCTS INC, 2010)
Two new sesquiterpene lactones 8 alpha-(2`,3`-dihydroxy-2`-methylbutanoyl)-15-desoxygoyazensolide and 16 alpha-(1`,2`-dihydroxy-1`-methylpropyl)-eremantholide have been identified as constituents of Eremanthus argenteus ...
A new species of the Brazilian genus Chresta (Asteraceae, Vernonieae) from Bahia
(Wiley Blackwell Publishing, Inc, 2008-07)
A new species of the genus Chresta Vell. ex DC. (Vernonieae,Asteraceae) from the Brazilian state of Bahia is described and illustrated. The new species resembles Chresta pinnatifida (Philipson) H.Rob. but differs in having ...
Eupatorium rufescens y Vernonia oligactoides (Asteraceae), nuevas citas para la flora argentinaEupatorium rufescens and Vernonia oligactoides (Asteraceae), new records for the Argentinian flora
(Instituto de Botánica del Nordeste, 2008-12)
Se mencionan por primera vez para la flora argentina a Eupatorium rufescens Lund ex DC. y Vernonia oligactoides Less. (Asteraceae). Ambas entidades son descriptas y se presenta una clave para diferenciarlas de taxones ...
The transfer of Vernonia perangusta to the genus Vernonanthura (Vernonieae, Asteraceae) and the correct name for Vernonanthura phosphorica
(Magnolia Press, 2010-08-31)
The size and geographical distribution of the genus Vernonia, tribe Vernonieae, has been greatly reduced as a result of several revisionary studies. All species of Vernonia are now confined to the New World with the vast ...
Sesquiterpene lactones from Chrysolaena platensis
(Pergamon-Elsevier Science Ltd, 2000-08)
Aerial parts of Chrysolaena platensis (Spreng.) Robinson were collected at the flowering stage on December 28, 1997 in Misiones Province, Argentina. A voucher specimen (LIL 603539) is on deposit in the herbarium of the ...
Lessingianthus magnificus Deble, Dematteis & Marchiori (Asteraceae), nova espécie do norte do Uruguai e Rio Grande do Sul (Brasil)
(Universidade Federal Santa Maria, 2005-11)
É descrita e ilustrada uma nova espécie de Asteraceae: Lessingianthus magnificus Deble, Dematteis & Marchiori, do norte do Uruguai e Rio Grande do Sul (Brasil). Relacionada a Lessingianthus macrocephalus (Less.) H. Rob., ...
Karyotype analysis and DNA content in some species of Chrysolaena (Vernonieae, Asteraceae)
(Taylor & Francis Ltd, 2013-12-17)
Cytogenetic characterization by karyotyping and determination of DNA content by flow cytometry of five species of Chrysolaena (Vernonieae, Asteraceae) was performed. This is the first study of nuclear DNA content realized ...
Pollen morphology of some species of Vernonanthura (Asteraceae, Vernonieae) from southern South America
(American Association of Stratigraphic Palynologists Foundation, 2011-06)
Pollen grains from 16 species of Vernonanthura H. Rob. were studied. All the species exhibit the type 'A' pollen characteristic of the genus. These grains are spheroidal to prolate-spheroidal, subechinolophate, tricolporate, ...
Pollen morphology of the south american genus Lessingianthus (Vernonieae, Asteraceae) and its taxonomic implications
(Taylor & Francis As, 2010-03)
The pollen grains of 111 species of Lessingianthus were analysed. Almost all the species belong to the type "B" pollen, characteristic of the genus. These grains are oblate-spheroidal, spheroidal to prolate-spheroidal (P/E ...
A New Species of Lychnophora Mart. (Vernonieae: Asteraceae) from Minas Gerais State, Brazil
(American Society of Plant Taxonomists, 2018-10)
The genus Lychnophora (Vernonieae: Asteraceae) comprises ca. 23 species restricted to Bahia, Goiás, Minas Gerais, and São Paulo States, Brazil. Diamantina's Plateau in the Espinhaço Range of Minas Gerais State is the ...