( 169 ) XVI. Descriptions of the neto Genera and Species of the Class Composites belonging to the Floras of Peru, Mexico, and Chile. : Bi/ Mr. David Don, Libr. L.S. Read January 20, and March 17, 1829-The extensive herbaria formed in Peru, Quito, and Chile, by Ruiz, Pavon, and Tafalla, and the Mexican collections of Sess^ and Mocifio, having by fortunate circumstances come into the possession of Aylmer Bourke Lambert, Esq., whose unwearied zeal in the advancement of botanical science is already well known, I have thought that a description of the Composita, which form an important part of these collections, might not prove unacceptable to the Linnean Society. Perhaps no people have made greater sacrifices for science than the Spanish nation. Her expeditions and voyages of discovery were fitted out on a most munificent and extensive scale ; but unfortunately, the results of them have in but few instances been given to the scientific world. Don Hipolito Ruiz and Don Josh Pavon, accompanied by two draftsmen, were charged with the botanical mission to Peru in 1777, which lasted eleven years ; and their labours were afterwards continued by Don Juan Tafalla, a distinguished pupil of Ruiz, and formerly Professor of Botany at Lima, whose investigations were also extended to the pro-vince of Quito, and the fertile district of Guayaquil. Don Martin Sesse, Don Josef Mocino, and Don Vincente Cer-vantes, were charged with a similar mission to Mexico in the z 2 year
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