He began to publish
memoirs on botanical subjects at an early age. Between 1816 and 1822 and again in 1830, he traveled in South America, especially in south and central
Brazil, and the results of his study of the rich
flora of the regions through which he passed appeared in several books and numerous articles in scientific journals. In his first voyage, from 1816 to 1822, he explored the Brazilian backlands, traveling ca. 9,000 km, from
Southeast Brazil to
Río de la Plata, including the former
Cisplatina Province (
Uruguay). He was able to gather 24,000 specimens of plants, with 6,000
species, 2,000 birds, 16,000
insects and 135
mammals, plus many
reptiles,
mollusks and
fishes. Most of these species were described for the first time. In the next years he devoted himself to the study, classification, description and publication of this huge material, but he was considerably impaired by his ill health, due to diseases contracted during the tropical travels. In 1819 he was appointed correspondent of the
Académie des Sciences. He was awarded the
Légion d'honneur at the level of Chevalier, and the Portuguese
Order of Christ. == Works ==