Sway, I'm sure you, and your bud, have read Plants Delights blurb about these plants,
http://www.plantdelights.com/C....
Brian Williams has agreed with what the PDN site states. One interesting tidbit by Alan Galloway is that there
may be a separate plant called Tea Cups which is a tetraploid version of 'Coffee Cups'. Alan's original introduction, 'Coffee Cups', is ~6' tall. I've read that Tea Cups is the name most often used in Thailand and Australia.
Interestingly the only web seller I've found offering plants under both names is Florida Hill Nursery.
Coffee Cup,
Tea Cup. If this plant(s) had one form stable at 3-4' while another was stable at at 5-6' wouldn't more folks be selling both?
