This is a hybrid which does not occur naturally. The parent species, Abelia chinensis and A. uniflora are native to temperate Asia, including China, Taiwan, and Japan.
Abelia ×grandiflora, the glossy abelia, is a hybrid Abelia, raised by hybridising A. chinensis with A. uniflora. It is a deciduous or semi-evergreen multi-stemmed shrub with rounded, spreading, or gracefully arching branches to 1.0-1.8 m tall. The leaves are ovate, glossy, dark green, and 2–6 cm long. The flowers are produced in clusters, white, tinged pink, bell-shaped, to 2 cm long. Unlike most flowering shrubs in cultivation, the glossy abelia blooms from late summer to well into the autumn. -Wikipedia
Abelia ×grandiflora was first raised in 1886 at the Rovelli nursery at Pallanza (now Verbania), on Lake Maggiore in Italy. It is used as an ornamental plant in specimen plantings in gardens, or in a mixed border with other shrubs. Propagation is by cuttings. Variegated forms are also available commercially. -Wikipedia