A new species, Hypoxis colliculata from Oaxaca and Chiapas, México is presented here. It belongs to the group with black seeds and is separated from the other species by the colliculate sculpturing of the seeds.

During fieldwork in San Juan Teponaxtla, Oaxaca, 3 individuals of Aristolochia tricaudata Lemaire, a very rare species threatened with extinction, were observed with flowers and fruits. Although this species is present in many botanical gardens, fruits have never been observed.…

Existen muchos estudios sobre las políticas estatales para el control de las fronteras entre norte y sur; sin embargo, hay muy pocos sobre las estrategias concretas, individuales y colectivas que siguen los migrantes para atravesarlas y sobre cómo experimentan este…

Se hizo un estudio taxonómico de las palmas del género Geonoma Willdenow en México mediante recolecciones y observaciones morfológicas y ecológicas de esas palmas en diversas partes del país, y se revisaron ejemplares de herbarios nacionales y extranjeros. Las especies…

This study analyzes data and information of the physical and chemical characteristics of water, and type of sediments of the continental shelf of the Gulf of Tehuantepec, Mexico. The changes of salinity, temperature, and dissolved oxygen fluctuate according to the…