Mussaenda raiateensis is an evergreen shrub or small tree 1 to 10 meters in height. Leaves are opposite, bright to dark green, and rounded to elliptic.
They are often softly pubescent (covered with short, fine hairs) and prominently veined (ribbed). The flowers are small and tubular and borne in terminal clusters (cymes or panicles). The corolla is five-lobed, spreading and bright yellow. The surrounding calyx has five lobes, with one lobe of some flowers conspicuously enlarged, leaf-like and white in color. In many of the cultivars all five sepals are enlarged. The fruit is a small, fleshy, somewhat elongated berry containing many tiny seeds.
(McLaughlin, John and Garofalo, Joe. Mussaendas for South Florida Landscapes)