"I seem to recall there was a period when pink included some colors we'd consider yellow adjacent-because of the pigments used and differing because of compounding/etc."

Do you mean this? I knew that the flowers called "pinks" were so named because of their pinked (i.e. fringed) edges—making their name a derivative of a verb that I'm familiar with from the context of sewing. However, I'd no idea that the colour of the flowers is the reason we call the hue "pink".