 In Mexico City in 1787, Echeverría joined Martin de Sessé y Lacasta and Mariano Mociño Suárez de Figueroa on their Royal Botanical Expedition to New Spain, which had the goal of compiling a great inventory of fauna and flora of New Spain.In 1791, he continued onto the California portion of the expedition, where he made images of 200 plant species.In 1794, he traveled to the Caribbean with Sessé and botanist Jaime Senseve.