The petiole and rachis anatomy of II North American Astragalus species that show a tendency towards persistent petioles is described and illustrated by line drawings of representative transections. The results are compared with those of a spine anatomical survey of 200 Old World Astragalus and Astracantha species. Attention was given to the anatomical characters previously determined to be taxo...

Plants gums are complex mixtures of different polysaccharides with a variety of biological activities and pharmaceutical applications. Few studies have focused on physicochemical and biological properties of gums obtained from different plants. This study was designed to determine potential pharmaceutical and pharmacological values of the gum exudates and its isolated biopolymers obtained from ...

Calvo, J. & A. Granda (2022). Acerca de la identidad taxonómica cinco especies Senecio (Compositae) descritas por Candolle sobre base material recolectado Haenke durante Expedición Malaspina. Candollea 77: 145–158. En inglés, resúmenes en inglés y español. Las recolecciones realizadas el botánico bohemio Thaddeus América Malaspina (1789–1794) sirvieron a Augustin-Pyramus para describir numerosa...