Though ladies had been delicately sipping tea and comparing foliage colors, botanists had been arguing above taxonomic classifications, and we are able to only hope that a phylogenetic research by Alan Paton et al, published in 2019 has cleared up the botanical naming at the time and for all: https://danteufnwf.creacionblog.com/26593701/coleus-care-tips-no-further-a-mystery