Valverde-Valdés, María Teresa; Quijas, S; López-Villavicencio, M; Castillo-Argüero, Silvia
(2004)
One of the habitats occupied by Mammillaria magnimamma is a 2000-year old lava-field, in Mexico City. The great ecological interest on this lava-field and the little knowledge there is regarding cacti population ecology ...