Arturo Gómez-Pompa Professor of Ecology and Botany in the Faculty of Sciences of the National University in the Institute of Biology at UNAM. These distinctive and academic positions have gained Gómez-Pompa a prestigious reputation in the ecological world. He discovered the use of Theobroma cacao, or the tree of chocolate, as ancient crops in rejolladas and cenotes within the Yucatán Peninsula. This confirmed his hypothesis on the anthropogenic origins of the Mayan forests and advanced future research in the domestication of tropical trees. Gómez-Pompa created a database for the Flora of Veracruz project in the 1960s that is still utilized to this
Tree and frost, and the seed germinates in the spring. Pine cones may similarly be hoarded by red squirrels, and grizzly bears may help to disperse the seed by raiding squirrel caches. The single extant species of Ginkgophyta ("Ginkgo biloba") has fleshy seeds produced at the ends of short branches on female trees, and "Gnetum", a tropical and subtropical group of gymnosperms produce seeds at the tip of a shoot axis. The earliest trees were tree ferns, horsetails and lycophytes, which grew in forests in the Carboniferous period. The first tree may have been "Wattieza", fossils of which have been found