Augustin Saint-Hilaire
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Augustin François César Prouvençal de Saint-Hilaire (1799-1853), French botanist and traveller, was born at Orleans on October 4, 1799. He began to publish memoirs on botanical subjects at an early age. In 1816-1822 and again in 1830, he travelled 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, travelling ca. 9,000 km, from Northeast Brazil to Rio de la Plata. 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 Legion d'Honneur at the level if Chevalier, and of the Portuguese Order of Christ.
A keen observer, he is credited with important discoveries in botany, notably the direction of the radicule in the embryo sac and the double point of attachment of certain ovules. He owe to him also the description of two families, the Paronychiae and the Tamariscinae, as well as a large number of genera and species.
The works by which he is best known are the Flora Brasiliae Meridionalis in three volumes (1825-1832), published in conjunction with A. de Jussieu, and J. Cambessdes; Histoire des Plantes les plus Remarquables du Brésil et de Paraguay (1824), Plantes Usuélles des Brésiliens (1827-1828), also in conjunction with De Jussieu and Cambessdes; and Voyage Dans le District des Diamants et sur le littoral du Brésil, in two volumes (1833). His 'Leçons de Botanique, Comprénant Principalement la Morphologie Végetale (1840), was a comprehensive exposition of botanical morphology and of its application to systematic botany. He died at Orleans on September 3, 1853.
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- This article incorporates text from the Encyclopædia Britannica Eleventh Edition, a publication now in the public domain.
