Serissa is a genus of flowering plants in the family Rubiaceae, containing only one species, Serissa japonica. It is native to open sub-tropical woodlands and wet meadows in southeast Asia, from India, and China to Japan.
It is an evergreen or semi-evergreen shrub, 45–60 cm high, with oval, deep green, rather thick leaves that have an unpleasant smell if bruised (hence its name foetida). The upright stems branch in all directions and form a wide bushy dome. It is grown for its neat habit, good coverage of branches and long flowering time. It is also valued for its rough, grey trunk which tends to get lighter in color with age.
Serissa flowers practically all year round, but particularly from early spring to near autumn. The 4- to 6-lobed flowers are funnel-shaped and 1 cm wide. They first appear as pink buds but turn to a profusion of white flowers. Fertilizing is especially important during the long flowering period.