Amongst a batch of Kurume azaleas imported into Holland by a nurseryman called P. M . Koster some time before World War I was a plant of unknown origin. He gave it the name Malvaiica and crossed it with the species Azalea kaempferi and this gave rise to the group called Kaempferi hybrids. Sometimes this group is called Malvatica or Kaempferi x Malvaika but whichever name is used the plants are the same. The plants in this group are similar to the Kurume hybrids but are more upright in growth and not as bushy. The (lowers are in general slightly larger and bloom a week or two later in a similar colour range. They are quite as hardy as Kurume hybrids.