Dendrobium Illusion

I have three different plants of this cross, a hybrid of the tiny Dendrobium cuthbertsonii and the much larger Dendrobium lawesii.  This plant is intermediate between the other two, one of which has larger flowers that are orange in color and the other which has smaller flowers which are more red in color.  They are all around 12 cm tall and the flowers are 3 cm in size.