Serissa

Serissa japonica is a species of flowering plants in the family Rubiaceae. It is the sole species in genus Serissa. It is native to open sub-tropical woodlands and wet meadows in southeast Asia, from India, and China to Japan. It is commonly called the snowrose, tree of a thousand stars, or Japanese boxthorn. Snowrose and tree of a thousand stars are different cultivars. The only method of differentiating is measuring the difference in the shape and size of the flowers produced.

Description

Serissa japonica 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 one of its synonyms, 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 colour with age.

It 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.