Flower of the heart, Magnolia yajlachhi (subsect. Talauma, Nlagnoliaceae), a new species of ceremonial, medicinal, conservation and nurse tree relevance in the Zapotec culture, Sierra Norte de Oaxaca, Mexico

摘要

A new species of Magnolia from Sierra de Juarez, Oaxaca, Mexico, is described and illustrated. Magnolia yajlachhi belongs to sect. Talauma subsect. Talauma, locally known as yajlachhi ("flower of the heart" in Zapotec). It shares with XL lacandonica a subglobose mature fruit and entirely white petals. but differs in having fewer carpels and stamens, more lateral leaf veins per side, and orange seeds (vs. scarlet). It shares with M. zoquepopolucae a subglobose fruit but differs in having fewer carpels and stamens, entirely white petals (vs. purplish in the apical 3/4), more lateral leaf-veins per side, and orange seeds (vs. scarlet). It shares with M. mexicana a similar number of carpels and stamens but differs in having subglobose fruits to widely ovoid-depressed (vs. widely ellipsoid), more leaf-veins per side, entirely white petals (vs. adaxially purplish in the apical 3/4), and orange seeds (vs. scarlet). A key to Mexican species of sect. Talauma subsection Talauma is provided. This species was assessed as critically endangered (CR). The species has a ceremonial, medicinal, conservation and nurse-tree relevance in the Zapotecan culture.