Dos especies nuevas del género Jatropha de la seccion Platyphyllae (Euphorbiaceae)

Abstract

TWO NEW SPECIES OF JATROPHA FROM MEXICO ARE DESCRIBED: JATROPHA CONTRERASII, COLECTED ON THE SLPES OF RIO PETAQUILLAS, GUERRERO, AND JATROPHA TEHUANTEPECANA, COLLECTED IN THE ISTHMUS OF TEHUANTEPEC, OAXACA. BOTH TAXA BELONG TO SECTION PLATYPHYLLAE DEHGAN ET G. L. WEBSTER, ON ACCOUNT OF THEIR GAMOPETALOUS COROLLA, BISERIATE STAMENS, TRILOCULAR OVARY AND CARINATE FRUIT. THE TWO SPECIES ARE RELATED TO J. COSTARICENSIS G. L. WEBSTER ET POVEDA (ENDEMIC SPECIES FROM COSTA RICA) AND BETWEEN THEMSELVES, THOUGH J. TEHUANTEPECANA AND THE J. COSTARICENSIS INDUBITABLY ARE MORE CLOSELY RELATED.