Dendrobium violaceum is a variable species both in flower color and plant size. This particular example is very large and has flowers that are also larger than some of the other plants of this species I own. In this case the plant is 30 cm tall, one of the largest plants I have, and the flowers are 3.5 cm. The plant comes from Papua New Guinea and the name violaceum refers to the color of the flowers. These flowers opened not violet but pink and faded to the color seen in the photos.