Se describe e ilustra Agave guadarramae N.C. Jiménez et García-Mend., especie nueva descubierta en la sierra Madrigal, municipio de Teapa, Tabasco, México. Pertenece a sección Guatemalenses; se le compara con A. calderonii Trel. (binomio prioritario para el taxón conocido como parvidentata Trel.) y pachycentra Trel., misma acicularis Antillares. caracteriza por las rosetas solitarias, laxas, ta...

The name Albuca caudata Jacq. has been widely misunderstood or even ignored since its description in 1791. After studying herbarium specimens and living populations in South Africa, plants fitting Jacquin´s concept of that species are found to be widely distributed in the Eastern Cape, mainly in the Albany centre of Endemism. Furthermore, some divergent specimens matching Baker´s concept of Alb...

The radiation of the angiosperms is often attributed to repeated evolutionary shifts between different pollinators, as this process drives diversification of floral forms and can lead to reproductive isolation. Floral scent is an important functional trait in many pollination systems but has seldom been implicated as a key mechanism in pollinator transitions. In this study, we suggest a role fo...