Neolitsea is a genus of approximately 85 to 98 species of evergreen shrubs and small trees belonging to the laurel family Lauraceae, within the order Laurales. The genus ranges broadly across Indo-Malaysia, East Asia (including China, Japan, Korea, and Taiwan), and extends south to Australia.
Plants in this genus share several characteristic features. The leaves are alternate, clustered, or verticillate (arranged in whorls), and rarely subopposite. All species are dioecious, meaning individual plants are either male or female. The small flowers are typical of the Lauraceae family, and the genus shows considerable variation in tree size, from low shrubs to trees reaching 15–18 metres.
Australia is home to three species, collectively known as bolly gums, which are a notable component of eastern rainforest communities. The most familiar is Neolitsea dealbata, the hairy-leaved bolly gum, a tree that can reach 12 metres. Neolitsea sericea, native to Japan, Korea, Taiwan, and China, is a widely cultivated ornamental reaching up to 15 metres. Neolitsea cassia occurs in Sri Lanka.
Many species of Neolitsea have attracted scientific interest for their production of essential oils and the associated biological activity of their secondary compounds.
Distribution
Neolitsea ranges from Indo-Malaysia through East Asia — including China, Japan, Korea, and Taiwan — to Australia. Three Australian species occur in the eastern rainforests, where they are commonly known as bolly gums. Additional species are recorded from Sri Lanka, Hong Kong, and Pacific island groups including the Andaman and Nicobar Islands.
Ecology
Many Neolitsea species have been studied for their essential oils and associated biological activity. In Australia, the three native species (bolly gums) are characteristic and fairly common members of eastern rainforest communities.
Taxonomy Notes
The genus was described within the family Lauraceae (order Laurales). Wikipedia lists approximately 85–98 accepted species while GBIF's backbone indexes fewer descendants — a common discrepancy reflecting the lag between monographic taxonomic treatments and GBIF's aggregated dataset. The genus name Neolitsea indicates its close relationship to the older genus Litsea (Greek/Latin prefix neo-, "new").
