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Comparison page here from Thomas Huber. He's recently updated all the chrysanthus/biflorus cvs but this page shows the tommies:http://www.srgc.org.uk/discus/messages/5012/8868.html?1129846074scroll down to bottom of first post for tommies.As far as I understand it Whitewell purple has a dark tube. Here's mine, taken last year, they're not out yetCrocus Whitewell Purple
Addendum...Mark Mc,Mark S.the tommies (pict.3) could be "Ruby Giant" as supposed. The picture was taken in sunshine and almost all DSC cannot reproduce the correct ruby-violet color. Cv. "Ruby Giant" has a dark stem and it is a sterile clone. The Flower is larger then ordinary tommies and has a silvery gloss. See my picture of mixed tommies. Pict. 1 & 2 seems to be a vernus cultivar. Was the name accidentally Queen of the Blues (C. vernus) instead of Violet Queen (C. sieberi ssp. atticus)? "Queen of the Blues" has some fine stripes inside the flower.As Maggie correctly wrote reg. "Whitewell Purple" we don't have a common opinion on the forum. There seem to exist two commercial forms. One form has large flowers and a dark base and stem. Late flowering. Size almost like a C. vernus hybrid.(image like your 2nd. photo).The other form of "Whitewell Purple" is more like a tommie, early flowering, white stem (no dark base)"Barrs Purple" for reference.
The confusion around 'Ruby Giant', 'Whitewell Purple' and 'Barr's Purple' is still valid.