Dendrobium pulchellum

Orchid for ID: Please identify this Dendrobium species.
I have not a complit plant photo, but the plant is 30-50 cm long and 1-1.5 cm thick, flowering in the month of May, flower is very big about 6-7cm across, callected from Sikkim.
Could it be Dendrobium hookerianum?
Some links for comparison:
I think this is Dendrobium pulchellum.
Just for your information. Dendrobium pulchellum was last reported by Hooker in Flora of British India in 1890 and never afterwards. This is a nice information to publish.