The Prince devotes a whole chapter of his book to New Harmony, its environs, and to the work and personalities of two leading American naturalists who lived there, Thomas Say and Charles-Alexandre Lesueur.
The specific name sayanus is a tribute to naturalist Thomas Say.
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He issued a life of Wilson in 1828 and published biographies of his fellow naturalists Thomas Say (1834) and Charles Alexandre Lesueur (1849).