The scientific name of yellow bell is Tecoma stans. Varieties of Tecoma stans include Tecoma stans var. stans and Tecoma stans var. angustata. Tecoma stans is a member of the bignonia plant family.
Tecoma stans is also known as yellow elder, yellow trumpet flower, esperanza and tronadora. The name "yellow bell" is attributed to its trumpet-shaped yellow flowers, which bloom from early spring through late fall. Tecoma stans var. angustata is the variety of yellow bell that is indigenous to the southwestern United States, Mexico and South America. Tecoma stans is also found in southern Florida and throughout the Caribbean islands.