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Pollen morphology of some species of Vernonia s. l. (Vernonieae, Asteraceae) from Argentina and Paraguay
(Taylor & Francis As, 2008-06)
Pollen morphology is widely used in taxonomic treatments of tribe Vernonieae, and differences in exine structure and aperture form have been described for many species within the genera comprising the tribe. However, in ...
Systematic significance of cypsela morphology in Lessingianthus (Vernonieae, Asteraceae)
(Csiro Publishing, 2015-11)
The taxonomic significance of cypsela features of South American species of Lessingianthus (Vernonieae,Asteraceae) is analysed for the first time and discussed in relation to other genera of the tribe Vernonieae. The ...
Taxonomy of the Vernonia rubricaulis complex (Vernonieae, Asteraceae)Taxonomía del complejo Vernonia rubricaulis (Vernonieae, Asteraceae)
(Instituto de Botánica del Nordeste, 2004)
Systematic significance of cypsela morphology in Lessingianthus (Vernonieae, Asteraceae)
(Csiro Publishing, 2015-08-07)
The taxonomic significance of cypsela features of South American species of Lessingianthus (Vernonieae,
Asteraceae) is analysed for the first time and discussed in relation to other genera of the tribe Vernonieae. The ...
Taxonomía del complejo vernonia rubricaulis (vernonieae, ssteraceae)Taxonomy of the vernonia rubricaulis complex (vernonieae, asteraceae)
(Instituto de Botánica del Nordeste, 2004-01-01)
El grupo de entidades afines a Vernonia rubricaulis Humb. & Bonpl. ha sido tratado alternativamente como una sola especie muy variable o como diferentes entidades por distintos autores. En el presente trabajo se describen ...
Familia Asteraceae: Tribu Vernonieae
(Hemisferio Sur, 2017)
Hierbas anuales o perennes, sufrútices, arbustos o trepadoras, rara vez árboles, a veces rizomatosas o con xilopodio. Hojas alternas o subopuestas, rara vez verticiladas, sésiles o pecioladas. Capítulos discoides, a veces ...
Taxonomic notes on the genus Chrysolaena (Vernonieae, Asteraceae), including a new species endemic to Paraguay
(Finnish Zoological and Botanical Publishing Board, 2007-12)
The genus Chrysolaena H. Rob. (Vernonieae, Asteraceae) is redefined to include two taxa previously placed in Lessingianthus subgen. Oligocephalus H. Rob. Additionally, a new species of the genus endemic to eastern Paraguay ...
Embryology and fertility of the natural tetraploid Lessingianthus plantaginoides (Asteraceae, Vernonieae): taxonomic implications
Lessingianthus plantaginoides (Vernonieae, Asteraceae) is a small natural tetraploid shrub that inhabits rocky highlands from South America. The population studied inhabits and covers an extensive region of a private reserve ...