Rhododendron ( Christopher Wren Mollis Hybrid Azalea )
The Mollis deciduous azalea hybrids were developed in Belgium principally from R. japonicum , but the pedigree include R. Peruvian mastic tree and perhaps R. viscosum , as well as many other species and hybrids . They are improbable , upright plants , good in light shade to full sun . The Mollis hybrids are often more resistant to heat than the Knap Hill azalea . The individual flowers bloom in mid to tardy time of year in clusters of 7 to 13 blossoms ....