Complex sentence: They often have a colonial ecology, growing to relatively large shrubs of some 4 to 5 metres tall, in full understorey shade of riparian or middle to low altitude evergreen forests, in warm and humid climes.
Split into simpler sentences: They often have a colonial ecology, growing to relatively large shrubs of some 4 to 5 metres tall in full understorey shade. They occur in riparian or middle to low altitude evergreen forests, in warm and humid climes.