John Torrey was an American botanist, chemist, and physician. Throughout much of his career, he was a teacher of chemistry, often at multiple universities, while he also pursued botanical work, focusing on the flora of North America. His most renowned works include studies of the New York flora, the Mexican Boundary, the Pacific railroad surveys, and the uncompleted Flora of North America.
The United States and Mexican Boundary Survey (1848–1855) determined the border between the United States and Mexico as defined in the Treaty of Guadalupe Hidalgo, which had ended the Mexican–American War. In 1850, the U.S. government commissioned John Russel Bartlett to lead the survey. The results of the survey were published in the three volumes entitled Report on the United States and Mexican boundary survey, made under the direction of the secretary of the Interior by William H. Emory (1857-1859).
The Gran Desierto de Altar is one of the major sub-ecoregions of the Sonoran Desert, located in the State of Sonora, in northwest Mexico. It includes the only active erg dune region in North America. The desert extends across much of the northern border of the Gulf of California, spanning more than 100 kilometres (62 mi) east to west and over 50 kilometres (31 mi) north to south. It constitutes the largest continuous wilderness area within the Sonoran Desert.
Dalbergia glomerata is a species of legume in the family Fabaceae. It is found only in Mexico.
Quercus toumeyi, the Toumey oak, is a North American species of tree in the beech family. It is found in northwestern Mexico and the southwestern United States. It grows in Sonora, Chihuahua, Arizona, New Mexico, and the extreme westernmost tip of Texas.
Dicoria canescens is a North American flowering plant in the family Asteraceae known by several common names including desert twinbugs and bugseed. This is a desert plant of the southwestern United States and northwestern Mexico, found in Sonora, Baja California, southern California, Nevada, Arizona, Utah, southwestern Colorado, and northwestern New Mexico.
Cirsium neomexicanum is a North American species of thistle known by the common names New Mexico thistle, powderpuff thistle, lavender thistle, foss thistle and desert thistle.
Tiquilia canescens, the woody crinklemat or shrubby tiquilia, is a perennial, shrub in mid- to lower-elevation desert regions in the family Boraginaceae - Borage or the Forget-me-nots. It is found in the southwestern United States and Northwestern Mexico, in the states of California, Nevada, Arizona, Utah, New Mexico, Texas, Chihuahua, Sonora, and Baja California. It is a short, low-growing plant, seldom over 15 in tall.
Clappia suaedifolia is the sole species in the North American genus of flowering plants in the family Asteraceae, Clappia.
Bursera fagaroides is a species of flowering plant in the genus Bursera known by the common names torchwood copal and fragrant bursera. It is widespread across much of Mexico from Sonora to Oaxaca, and its range extends just into Arizona in the United States, although some sources suggest that it may now be extirpated in Arizona.
Ambrosia cheiranthifolia is a rare species of flowering plant known by the common names South Texas ambrosia and Rio Grande ragweed. It is native to the coast of South Texas and the Mexican states of Tamaulipas and Coahuila. It occurs in coastal prairie, grassland, and mesquite shrubland habitat. It has declined because its native habitat has been cleared for development, with remaining open savanna invaded by non-native grasses such as buffelgrass. Today there are perhaps 20 populations remaining, but some of these may have very few genetic individuals because the species is clonal, with many cloned plants attached by one rhizome. It is not certain that the plant still exists in Mexico. This is a federally listed endangered species of the United States.
Celtis ehrenbergiana, called the desert hackberry or spiny hackberry, is a plant species that has long been called C. pallida by many authors, including in the "Flora of North America" database. It is native to Arizona, Florida, New Mexico and Texas, and to Latin America as far south as central Argentina. It grows in dry locations such as deserts, brushlands, canyons, mesas and grasslands.
Acleisanthes parvifolia, common names littleleaf moonpod and Big Bend trumpets, is a plant species native to northeastern Chihuahua, Mexico, and western Texas, United States. In Texas, is known from only 4 counties: Culberson, Hudspeth, Brewster and Presidio. Some of the populations are situated inside Big Bend National Park, others within Guadalupe Mountains National Park.
Fraxinus cuspidata, the fragrant ash, is a tree native to northern Mexico and the southwestern United States. It has been reported from Nuevo León, Coahuila, Chihuahua, Tamaulipas, Texas, New Mexico, Arizona and Nevada.
Galium orizabense is a species of plants in the family Rubiaceae, named for the town of Orizaba in Veracruz, where the first collections of the species were made. The species is native to Mexico, Costa Rica, Guatemala, Panamá, Venezuela, Colombia, and Hispaniola, plus widely scattered locations in the southeastern United States.
Jesse More Greenman was an American botanist. He specialized in tropical flora, with emphasis on plants from Mexico and Central America. He was an authority on the genus Senecio and noted for his work at the Missouri Botanical Garden.
Dicoria calliptera is a Mexican species of flowering plant in the family Asteraceae. It has been found only in the State of Sonora, on hills near Adair Bay at the northern end of the Gulf of California, west of Puerto Peñasco.
Dieteria asteroides, the fall tansyaster, is a North American species of plants in the sunflower family. It is native to the southwestern United States and northern Mexico.
Guardiola platyphylla, the Apache plant, is a North American species of plants in the family Asteraceae, native to Mexico and the southwestern United States. It is found in northwestern Mexico and the southwestern United States.
Bursera filicifolia is an uncommon North American species of trees in the Frankincense Family in the soapwood order. It has been found only in the States of Sonora and Baja California Sur in northwestern Mexico.
