Cucurbita diversity tree
added Japan as end group for C. moschata as this is indicated as Secondary center of diversity for C. moschata in Esquinas-Alcazar, J. T., & Gulick, P. J. (1983). Genetic Resources of Cucurbitaceae – a global report.IBPGR, Rome, 1983, 112p. International Board for Plant Genetic Resources, Rome, Italy.