Abstract: ‘Ziyun Lunhui’,a new tree peony cultivar,was developed through distant hybridization. It used the F₁ hybrid of‘Baihe’× Paeonia delavayi as the female parent and P. delavayi as the male parent. The plant is half spread and medium tall plant. Blooming early,it produces single petal shape flowers,often with lateral flowers. The petals are predominantly red（RHS 187A）,and there are black spots at the base of the petals. This cultivar is characterized by its unique fragrance,vigorous growth,and a high flower production rate. The overall flowering period is extended by 10-15 days compared to traditional varieties and demonstrates a reblooming characteristic,though it does not set seeds. Demonstrating strong drought tolerance and adaptability to poor soils,‘Ziyun Lunhui’is well-suited for both cut flower production and landscape applications. This cultivar can be cultivated in all regions suitable for growing tree peonies.

Key words: tree peony, distant hybridization, cultivar