Between the Lime and the Exochorda, which can be expected to have more variety between individual plants?
Exochorda Exochorda is a small genus of flowering plants in the family Rosaceae, native to China and central Asia (Turkestan). They are used as ornamental plants with the common name pearl bush, or pearlbush. Numerous species have been described on the basis of differing appearance and geographical separation, but a systematic study revealed that the different types are closely related and probably all descended from a single species that formerly had a wide distribution that has been fragmented by habitat loss. As a single species the correct name is "E. racemosa".
Ehretia tinifolia Ehretia tinifolia is a woody, perennial tree, usually 0.5 to 3 m in height, branched from the base, from reddish-brown to red-purple bark, exfoliating (the outer bark opens and peels off like a sheet of paper); The leaves are coriaceous, elliptic, from 1 to 3.3 cm long. The flower is urceolate, white to Mexican pink and grouped in clusters of five to eight flowers. The plant can reproduce vegetatively from branches that are buried, but this type of reproduction is rare.