I did a search on "Coleus canina" and not only is the name consistently misspelled but most of the information given is false and fantasy. The plant is a well documented widespread weedy species not a hybrid created in Germany.

It is just the latest plant hoax being perpetrated by some unscrupulous European dealers. The sad thing is that some American nurseries have fallen for all the hype hook, line and sinker. They show themselves to be simply naive and too lazy to do a little homework of their own. Apparently some garden writers are no better. The shame of it all.