Dear Jim, I can only go by my experience of these plants in my gardens and on that recent trip to the peloponese. Crocus boryi in my mind is just as described rather a creamy and substantial flower that has some foliage with the flowers too. C.pulchellus even in its white form is never quite that wonderful creamy tint nor ever quite so substantial.C.boryi has big bowl-shaped flowers whereas pulchellus is more slender.The latter seeds prolifically but as I am new with growing the former can't say how they compare on that score. Once seen you really can't confuse them.Crocus goulimyi leucanthus was also seen but is quite unlike the others in its long tube and general shape. Crocus niveus also was seen once or twice but in poor shape so I can't say anything about that species. Corcus boryi was very common and is a very beautiful species. I am amazed that I have not seen it in gardens before. Kind regards, Mark