Anthocyanic: Containing anthocyanin pigments.*
Anthocyanins give plants their purple, blue, and scarlet colours. They are responsible for the vibrant reds and purples we see in some autumn leaves. Plants such as maples (Acer), sumac (Rhus) and many others are anthocyanic.
*Harris, J.G., Harris, M.W. (2001). Plant identification terminology: An illustrated glossary (2nd ed.). Spring Lake: Spring Lake Publishing.