Distribución geográfica del género Echinopepon (Cucurbitaceae)

Abstract

ECHINOPEPON COMPRISES SEVEN SPECIES, FOUR ENDEMIC TO MEXICO. IT HAS A DISTRIBUTION FROM SOUTHWESTERN UNITED STATES TO ARGENTINA. THE DISTRIBUTION, DIVERSITY AND THE ENDEMISM SUGGEST THAT THE GENUS HAS ITS ORIGIN AND EVOLUTION IN MEXICO WITH TWO LINES: SPECIES OF TEMPERATE CLIMATE GROWING IN THE VALLEYS AT 2000M ALTITUDE, AND SPECIES OF WARM CLIMATE GROWING AT LOWER ELEVATIONS ALONG THE PACIFIC COAST.