 የተለያዩ ዝርያዎች በአበቦች ቀለም እና ቅርፅት ብቻ ሳይሆን በጫካው በራሱ (ለምሳሌ ያህል, ግዙፍ ቻይናኛ ኩፐን እስከ 120 ሴንቲ ሜትር ከፍ ብሏል.
In total, there are about 50 species of kupen, and various varieties differ not only in the color and shape of flowers, but also in the size of the bush itself (for example, the giant Chinese kupen grows to a height of 120 cm).