During this period he collected and catalogued plants in the region. He eventually left Mexico and travelled the world exploring many countries and conducting botanical research culminating in Arizona and Alta California in the early 19th century.
During this time, he gathered and documented plants in the region. He eventually departed Mexico and traveled extensively throughout various countries, conducting botanical research that ultimately led to his work in Arizona and Alta California in the early 19th century, which is similar to his later endeavors.