A dud orchid never flowers

[Orchidnut]

I have some sort of Maxillaria I have had it for years . I bought it with the name tenufolia but it is not it's growth habbit is not at all like one. I have bought other tenufolia's and the growth habit is a climbing in a up right manner . this plant that I have is all clustered up it just gets wider each year the folliage looks great I get new growths but i have had it over 15 years . I have divided it . I have put it in hoter conditions I have put it in cool moist conditions I fertilize it just like all my other orchids my other tenufolia blooms. I really think it is a dud and will not flower. My Mom bought one at the same time from the same grower and hers never flowered either. I have tried it in all conditions I can think of. It is healthy nice roots new growths but never any flowers. I am about ready to chuck those little things right in the trash.
Any Idea's?
Bonnie