I also was able to pick up this T. xlineatispica which is supposed to be a natural hybrid of fasciculata x utriculata from the Virgin Islands. The growers are growing them in big pots and say the bigger the pot the bigger the plant. That seems rather odd to me, but they had several growing so why argue.

My purchase, about a meter across:

{{gwi:447349}}

Another plant's inflorescense, photo from Lynn:

{{gwi:447350}}