The trans-border flora of the San Bernardino National Wildlife Refuge in Arizona and Rancho San Bernardino in Sonora has 541 taxa in 316 genera and 86 families. The most diverse families are Poaceae (88 taxa), Asteraceae (84 taxa), Fabaceae (28 species), …

The Municipality of Huatabampo is located along the coast of the Gulf of California in southern Sonora, Mexico. The vegetation is coastal thornscrub, the more xeric version of tropical deciduous forest. In 1890, Edward Palmer collected plants at Agiabampo in the municipality. In the late 1980s…

This magnificent flora of the Sonoran Desert’s southern edge represents decades of meticulous work and the genius of Richard Felger (1934–2020) and his colleagues at their best. It is many things at once. A project of passion that was sparked by a trip in 1953 by an impressionable young…