Wild Allamanda is a perennial vine-like shrub with yellow Allamanda like flowers. The flower color is almost neon yellow throughout. Grows as a vine-like shrub when it is young. The light yellow, trumpet-like blossoms appear on the tips of new growth and from side branches on the vine. Flowers bloom almost year-round, although the plant is not covered with flowers like the Allamanda. Hummingbirds and butterflies will visit the blossoms.