Delavay peony with streaked flower

Delavayanae tree peony with the following characteristics: small flowers, mainly from bright to dark yellow with light or dark brown streaks and stamen in the same colour. Delicate, pleasant scent. Tall, somewhat vigorous shrub. Reaches a height of 1.5 metres in its natural state. Intermediate flowering time. It was discovered and named by G.Potanin, and was once classified as Paeonia potanini.