Does anybody have this clone or its photo? Is it really multifloral and can be considered as var. regnieri? Found nothing about this clone in the Internet.
You are very lucky, or it is me, who is very unlucky. At the moment I have one concolor (Spotty x Duddley Ott AM/AOS). It bloomed for me last year and had one flower. But may be it will improve next year. Anyway, quite many of my friends have concolors with two flowers per inforescence. I haven't seen three flowers yet (I don't count photos from Internet).It is fairly common for even "off the shelf" concolors to have two to three flowers per inflorescence.
Do you have collection location information for where the var regnierii would have been collected from? If you can't find collection location data it is probably not a currently valid designation.
the var regnierii is an old name, from the 19th century, I do not think today it is considered a valid name. In those days often a variety name was given in the same manner that today we give individual clones names. Then as the nomenclature was later cleaned up some of the clonal names were mistakenly retained as if they represented geographic races.
I just bought a Paph. concolor var. longipetalum. Not sure if it's a true taxon or one of the trade varieties, but it certainly is distinctive! I have some pix of one of its sibs and hope to post them when I get back to Chi-town.