Whoa, got this as a seedling about 2-3 years ago, and this is first bloom...from what I can figure, appendiculatum may be a syn. for barbatum (small flower, toothbrush-y looking lip). Smallish flowers, though not too much smaller than some pileatum; they have an appealing fringe, and a very subtle daytime scent with overtones of eucalyptus, grapefruit, and rose.
Regards - Nancy