Southern China, Taiwan, India, Himalaya
Large, erect deciduous shrub
Shade, even moisture, tolerant of high pH (chalky soils), and the flower (sepal) colors tend not to be affected by pH; prune after flowering.
Single use or in masses; woodland
Opposite, simple, ovate, 4 to 5 inch long, to 2 to 3 inches wide on flowering shoots, 6 to 10 inches by 4 to 7 inches on non-flopwering shoots.
5 to 6 inch diameter, flat, lacey clusters with a ring of white, sterile flowers that surround blue fertile flowers in the center. July to early August.