Solenostemon, commonly known as "Coleus" is a genus of flowering plants in the family Lamiaceae.
 Several species formerly included have been moved to the genus "Plectranthus".
 They are native to tropical Africa, Asia and Australia.
 Some species are cultivated for their highly variegated leaves.
Pseudocydonia sinensis, the Chinese quince, is a deciduous or semi-evergreen tree in the family Rosaceae, native to eastern Asia in China, and the sole species in the genus Pseudocydonia.
 It is closely related to the east Asian genus "Chaenomeles", and is sometimes placed in "Chaenomeles" as "C. sinensis", but notable differences are the lack of thorns, and that the flowers are produced singly, not in clusters.
 The Chinese quince is also closely related to the European Quince genus "Cydonia"; notable differences include the serrated leaves, and lack of fuzz.

Question: how is Solenostemon and Pseudocydonia connected?
Answer: flowers