Dendrobium is such a large genera that it is divided into about 11 sections ; all the species in any one section are generally similar to all the others in that section. A great help in identification and culture.
These dendrobes with fine black hairs on the canes are in a section which is called - in the older books, "nigro hirsute" but that esaily remembered , and clearly recognisable name ( meaning black and hairy) is considered to be politically uncorrect nowadays , and has been replaced with a quite unmemorable name which I have forgotten.
However, the interesting thing about John's post is that he says he grows this in S/H. I have had a lot of success with nobile section dendrobes that way - keikis often flower withing less than a year of being potted up and stood in the water, but I have not ciucceeded with any nigro-hirsute section ones ( and I have tried a couple of times) . I'll try again - there are several really lovely ones to have a go at. Thanks John.