Mary Sue, The plant is, correctly, T. tricolor, this being the only one of the two names listed in the IPNI and in the Sparre and Andersson monograph (A Taxonomic Revision of the Tropaeolaceae, Opera Botanica, No 108, 1991, ISBN 87-88702-47-2). The name tricolorum has cropped up in a few commercial catalogues of late, but to my knowledge has not been validly published. A host of subspecific names of T. tricolor were published in the 19th century, based on cultivated selections, but in my experience the plant currently in cultivation is very uniform. Does anyone have any experience of variation of the plant in cultivation or the wild? One curious feature that I have found is a remarkable variation in the quantity of flower produced year to year. I have had 3 tubers for ~8 years and each produces ample foliage each winter, but the flowering is very variable, from a few to 50+ per stem. This is despite the plants being grown under near identical conditions (cool greenhouse) regarding temperature and light from year to year. regards Robin