What is "streptosolen"

Streptosolen is a genus of flowering plants with a single species, Streptosolen jamesonii, the marmalade bush. It is an evergreen shrub of the Solanaceae family that produces loose clusters of flowers gradually changing from yellow to red as they develop, resulting in an overall appearance resembling orange marmalade (thus the name), found in open woodlands of Colombia, Ecuador, and Peru.

The stems tend to be tall and slender, with an overall height of . The leaves are ovate to elliptic, green to dark green, with a pattern of fine wrinkles. The flowers have a slender tube 3–4 cm long, with spreading petal lobes. The blooms can appear nearly all year in mild-winter areas, but the heaviest flowering is from spring through fall. With a minimum temperature of , this plant must be overwintered indoors in frost-prone areas.

This plant has gained the Royal Horticultural Society's Award of Garden Merit.