Once again, the credibility of Dr. Tucker's argument is challenged by his carelessness in listing the names of genera:
"The correct name of our common coleus is also up for grabs. RHS and GRIN (see "The Name Game" on this page) used to list it as Solenostemon scutellarioides (L.) Codd, but now GRIN lists it as Plectranthus scutellarioides (L.) R. Br. Flora of China lists it as Coleus scutellarioides. Take your pick!"
We can't take our pick! Coleus and Solenostemon no longer exist as accepted names of genera.
There is another possibility. After reading your comment in the entry for XPerilla 'Gage's Shadow,' greene, I wondered whether Magilla Perilla and Magilla Vanilla might belong to this genus. The XPerilla (or X Perilla) genus was created by crossing Perilla frutescens with Plectranthus scutellarioides (referred to as Solenostemon scutellarioides in the patent, which was filed in 2007, before that name became obsolete).
Beefsteak Plant (XPerilla 'Gage's Shadow')