esperanza or yellow elder

Family of Bignoniaceae.
Esperanza has recently become a popular ornamental plant in Texas gardens. In the wild it will be found growing on rocky slopes near San Antonio and in the Trans-Pecos, north into New Mexico and Arizona, east to Florida and south into Central and South America in well drained soil and full sun. The Trans-Pecos plants are considered to be the most cold hardy.
The striking, tubular 2 1/2-inch bright yellow flowers are highlighted by the attractive, shiny, green foliage and continue through the heat of the summer. The flowers have an odd but pleasing fragrance and also provide nectar for bees. The Indians made bows from its wood, and in Mexico a beer was prepared from its roots; it has also been used for a variety of medicines.