Antecedentes y Objetivos: En Oaxaca, México, se reportan 26 especies del género Mammillaria; siete de ellas endémicas. Mammillaria deherdtiana subsp. dodsonii está catalogada como amenazada. Los objetivos trabajo fueron describir las características demográficas, reproductivas aspectos etnobotánicos su uso, así los florísticos bioclimáticos localidades estudiadas. Métodos: enero 2015 encontraro...

Chromosome counts and observations of reproduction for 55 taxa of Cactaceae indicate that polyploidy is correlated with self-fertility, adventive embryony, profuse branching, and vegetative reproduction. Six genera (Blossfeldia, Cleistocactus, Frailea, Pelecyphora, Rebutia, and Strombocactus) and 35 species or varieties are reported here for the first time. Preliminary observations of pachytene...

We describe a new endemic densely spined Mammillaria from San Luis Potosí, Mexico. The species, named M. morentiniana, is distinctive by the presence of globose to shortly cylindric stem with several glabrous, reddish central spines, radial spines that protrude plant like white needle-bristles, and small flowers pale yellow, lanceolate tepals. compare it similar sympatric species ser. Stylothel...