Has anyone a true A.longifolia?
I do, but it rarely flowers. It is distinctive among the small Acis species in that the scape is much longer in proportion to the flowers in comparison with those of Aa. autumnalis, nicaeensis, rosea, and trichophylla. Also, A. longifolia's flowers are smaller than those of the other species. The end result is a plant that is not well proportioned.
And, yes, the leaves are very long in comparison.
So persist: the real thing is out there somewhere.