Buscar
Mostrando ítems 1-9 de 9
Cytotaxonomy of some species of vernonanthura and vernonia (asteraceae, vernonieae) from south America
(Taylor & Francis, 2016-02)
The number and behavior of meiotic chromosomes in four populations of three species of Vernonanthura were analyzed. It was observed that all stages of meiosis were stable without chromosomal irregularities. The somatic ...
Pollen morphology and its relation with meiotic irregularities in ten species of campuloclinium (eupatorieae, asteraceae)
(Taylor & Francis As, 2017)
Pollen grains of ten species of Campuloclinium (Eupatorieae, Asteraceae) are described and illustrated using light and scanning electron microscopy. The species included in this study are C. burchelli, C. campuloclinioides, ...
A new polyploid species of mecardonia (gratioleae, plantaginaceae) from South America
(Magnolia Press, 2017-04-13)
Mecardonia reneeae, a new species from northeastern Argentina, is described and illustrated. This taxon has certain resem-
blance to M. procumbens var. flagellaris, but can be easily distinguished by the combination of ...
Lessingianthus concepcionis (asteraceae, vernonieae), a new octoploid species endemic to northern Paraguay
(Magnolia Press, 2016-06)
Lessingianthus concepcionis, a new species from northern Paraguay is described and illustrated. The new species has a certain resemblance to L. niederleinii but can be easily separated by the combination of leaves with ...
Vernonanthura nana (asteraceae: vernonieae), a new species from the Paraná State (Brazil)
(Magnolia Press, 2016-12)
A new species of Vernonanthura (Asteraceae), V. nana, from the Brazilian state of Paraná is described and illustrated. The new species resembles V. squamulosa but differs in its geographical distribution, habitat, shape ...
Systematics value of micromorphological and palynological characters in stenocephalum Sch. Bip (vernonieae, asteraceae)
(Tubitak Scientific & Technical Research Council Turkey, 2018-05)
Micromorphological and palynological characters of all Stenocephalum Sch.Bip. species (Vernonieae, Asteraceae) were analyzed to evaluate their reliability as taxonomic markers at generic level and discussed in relation to ...
Karyotypes of some species of the genus Lessingianthus (vernonieae, asteraceae) and taxonomic implications
(Wiley, 2014-09-11)
We determined the karyotypes of nine species of Lessingianthus , eight of which are here analyzed for the fi rst time. Th e results include the fi rst chromosome count for L. plantaginoides , which is tetraploid with 2n ...
The taxonomic utility of micromorphology in Lepidaploa (Vernonieae: Asteraceae)
(John Wiley & Sons Ltd, 2018-05-02)
Lepidaploa belongs to the Vernonieae tribe, one of the most complex tribes of Asteraceae. Nowadays, the relationship between Lepidaploa and its related genera is poorly understood. Different microcharacters might be of ...
Análisis preliminar del comportamiento meiótico y la viabilidad polínica en cinco especies del género Lessingianthus (Asteraceae, Vernonieae)
(Universidad Nacional del Nordeste. Secretaría General de Ciencia y Técnica, 2014)
Lessingianthus H. Rob. comprende más de 120 especies y constituye uno de los géneros mas grande de la tribu Vernonieae (Asteraceae). La poliploidía ha demostrado ser una de las principales fuerzas evolutivas y especiogénicas ...