A new rainforest species of Magnolia from Sierra Santa Marta, Soteapan, Los Tuxtlas, Veracruz, Mexico, is described and illustrated. Magnolia zoquepopolucae belongs to section Talauma, subsection Talauma. It differs from M. mexicana in having fruits spheroidal versus ovoid to ellipsoidal, the dorsal wall of carpels non humped versus humped, a larger number of carpels and stamens, longer petioles, petals and sepals, and more gradually attenuated petals. The flowers of this species are used to prepare a chocolate-like and masa (maize)-based hot drink by the Zoque Popoluca culture, which is valued for medicinal purposes.