Studies of Tropical American Plants—I by Cyrus Longworth Lundell explores numerous newly discovered or scientifically valuable species from regions such as southern British Honduras and the mountains of Chiapas. The collection mainly stems from the 1936 Michigan-Carnegie expedition and other subsequent field trips. Lundell's meticulous work includes detailed descriptions and classifications of plant species, including collaborative contributions on Solanaceae and Rubiaceae from experts C. V. Morton and P. C. Standley. The study highlights the botanical diversity and ecological significance of these regions and notes the continual discovery of new species, despite prior explorations. This volume serves as an essential resource for botanists and researchers focused on the flora of tropical America, offering an in-depth understanding of plant taxonomy, morphology, and geographical distribution in the specified areas.