2 2 2 MAGUIRE 



H. W. Rickett, Chron. Bot. Vol. 11, No. 1, 1947), at the same time when 

 Ruiz and Pavon were sent to Peru. Sesse and his associates, chief among 

 them Mocino, after seventeen years in Mexico and the regions to the south, 

 returned to Madrid, where the fruitful results of their labors met the same 

 fate that had befallen the works of Hernandez, that of being ignored by 

 authorities without publication. Finally, 274 species of plants from New Spain 

 were described by de Candolle from drawings made from the paintings of the 

 Sesse-Mociiio expedition. The original herbarium of some 4000 sheets is at 

 Madrid. 



During the last year of the Sesse expedition, von Humboldt arrived in 

 Mexico with the botanist Bonpland. From Bonpland's industrious field explora- 

 tion, nearly 1000 collections were made, of which many represented new species 

 that were described by Kunth. Botanical progress for nearly the succeeding 

 one hundred years was summarized in the work of Hemsley (1879-1888). 

 J. D. Smith published extensively on his own collections (Guatemala and 

 Costa Rica, more than 3500 numbers) made in 1889-1906, and those of 

 H. von Tiirckheim (Guatemala, about 3000 numbers) made in 1877-1908. The 

 last half century witnessed a great upsurge in field investigation and prepara- 

 tion of floristic writings dealing with the large and complex floras of Central 

 America and Mexico. 



In contemporary time, the Mexican botanists C. Conzatti (Generos vege- 

 tales Mexicanos, 1903-1905, and Flora taxonomica Mexicana, 1936-1947), 

 F. Miranda {La vegetacion de Chiapas, 1952-1953), E. Matuda, and E. Her- 

 nandez X. have been most active in field exploration. Many Europeans and 

 North Americans have recently contributed to the field botany of Mexico, 

 the more conspicuous among them being G. B. Hinton, who amassed some 

 10,000 collection numbers in large series mostly from the states of Mexico 

 and Guerrero; C. G. Pringle (1888-1906) with nearly 10,000 collections 

 chiefly from Coahuila, Nuevo Leon, Hidalgo, Nayarit, Jalisco ; and E. Palmer 

 (1886-1910) with considerably more than 2000 numbers from Chihuahua, 

 Coahuila, Durango, and San Luis Potosi. 



In 1924 (Proc. Cat. Acad. Vol. 12) I. M. Johnston reported on the expe- 

 dition of the California Academy of Sciences to the Gulf of California of 

 1921, during which the islands of the gulf and mainland of Sonora and 

 Baja California were visited. The work of this expedition was an important 

 precursor to that of the later expeditions of Wiggins (q.v.). 



In addition to the effective work of contemporary resident Mexican 

 botanists, A. J. Sharp of the University of Tennessee continues with his 

 program of taxonomic, ecologic, and phytogeographic studies in Tamaulipas 

 and San Luis Potosi; and Rogers McVaugh continues his more extended 

 floristic activity over many parts of the country. The well-known Trees and 

 Shrubs of Mexico (1920-1926) by Paul C. Standley was, as stated by the 



