Part of R. Good's (The Geography of the Flowering Plants, 1974) boreal kingdom. It is a large and extensive flora with 100–200 endemic (see endemism) genera. Robinia (locust tree) is a well-known example, and there is also Franklinia, a garden tree that was obtained from a single plant of a single species, and which is now extinct in the wild. As a whole the flora strongly resembles those of temperate Eurasia, and of China and Japan. See also floral province and floristic region.
Subjects: Plant Sciences and Forestry — Ecology and Conservation.