I have two plants of this species, one plant awarded, the flowers of which are not quite as brightly colored as this. It is a spring bloomer and blooms well on a rather attractive plant. The individual growths are 8 cm and the flowers 3 cm. The species is from the highlands of Papua New Guinea and belongs to the Oxyglossum group of Dendrobiums.
The other plant has flowers that are a slightly paler pink and the lip does not have the bright red tip. Both, however, fall within the range of variation for this species. The photo below shows the flowers of the other plant, Dendrobium seranicum 'Brendan' CBR/AOS.