Seed collected from willow leaf magnolias (M. salicifolia) in collections produce hybrids with star magnolia (M. stellata), and vice versa. Such hybrids appear to be among the hardiest of the magnolias. Experience in Finland so far only covers a short period but is very promising. The oldest of the shrubs at Mustila has already achieved flowering age.
Proctor’s magnolia is a very typical intermediate form between the two parent species. It has inherited from the star magnolia the large number of petals (>6) and the shrubby habit; the willow leaf magnolia’s influence can be seen in the narrow pointed leaves and their strong scent of aniseed when crushed or broken. The flowers are white, like those of both parents.