Dear Robin and All: I have three or four different versions of T. tricolor. One is very different in color, being more of a pale orange with a yellow mouth. It is very different from the others. The others seem to vary mostly in when they grow, sprouting at somewhat different times under the same conditions. All except one of the standard kinds were grown from Watson & Flores seed. I have one lonely tuber of T. azureum, which will only sprout every other year. It blooms profusely when it does grow. I read somewhere (I think it was in one of Christopher Lloyd's books) of a similar experience with T. azureum. Diana