Dendrobium alaticaulinum is a New Guinea Dendrobium from the Pedilonum section of that genus. Most of the New Guinea Dendrobiums I grow are from the Oxyglossum section. The Pedilonum Dendrobiums tend to be large plants with long semi-pendant canes, but this species is very small in comparison, the canes around 15 cm. The 2 cm flowers bloom at the end of the canes in clusters and do not open very widely. The plant is not a very eager bloomer for me, but since I reduced the light a bit it has bloomed a bit more freely.