Evan,
Yes, T. trilobatum does go dormant, and there are actually four hybrids in my picture. I have others not pictured, some much larger than the ones pictured and with coloration as well. They got this large from seed (seed germinated in summer of 2010, went dormant in Fall, then grew all summer in 2011, then went dormant, and now Spring 2012. A few bloomed in 2011 but they were in a 2 gallon community pot at that time. Even so, some of the tubers grew to amazing size by the end of summer 2011, hence the large plants I have now.
Dave,
Thanks for the compliments! I've not seen any T. venosum varieties with coloration, but I'm intending to change that as soon as I get my hands on a blooming size specimen (hopefully this year, but if not, next year). Success will mean a new day in Typhoniums - imagine a plant the size of T. venosum with silver veins and red spots on the leaves, and hardy. That's where I'm headed.
LariAnn
