Wigandia caracasana

I know that William Martins garden at Noorat is called Wigandia, but I never new that it was named after this plant. ( Actually, maybe it isnt!)

I saw one today at Roraima nursery in Lara, Victoria. They can grow to 8m tall and are native to Mexico, South and Central America. They are from the family Hydrophyllaceae and should be handled with gloves as their stiff hairs can be an irritant to skin. Im thinking that one could look pretty good on my roof garden!