Seeds Tecoma Stans or better known as Yellow Bells is very attractive and fragrant. The trumpet shaped blossoms are 2 inches long and an inch across and occur in large clusters of up to 50 flowers each, appearing summer and through the fall. Long bean like pods, 4 to 8 inches long, each filled with many small winged seeds, present most any time of the year. This shrub or small tree is capable of reaching 20 feet tall. Hardy in zones 9 to 11