Source of plant
US National Arboretum
This cultivar has cup-shaped flowers, 5"-7" in diameter, with 9-12 broad tepals. The inside surface of the tepals is white; the outside is a pale red-purple approaching pink at maturity. It is the latest of the "little Girl Hybrids" to bloom, flowering in early to mid May. Description from the 1968 U.S. National Arboretum plant distribution list which has been glued into the 1968 accession book.