Thanks Chuck. I remembered the Ae part. Now I'm curious to go soak
some of my dark purples, see what they have.
<A caveat. The reddish purple are definitely a yellow/blue combination.
A dark royal purple can be just anthocyanin, but with anthocyanin
vascular intrusions (AVI) resulting from Ae (anthocyanin enhancer)
gene from I. aphylla. With dark royal purple (bluish tone) you will
definitely need hot water test to be sure.