Butterfly Pea
Clitoria ternatea
Native to Asia, the butterfly pea can also be found in Africa, Australia, and the Americas. It has been used as a natural food dye, coloring foods brilliant blue.
Picture taken 2016/08/20 by Kelly Lewis.
A bit more information: http://suespottedterracegarden.blogspot.com/2015/07/lilac-butterfly-pea-vine-growing-in-pots.html?m=1
A source for butterfly pea tea: https://bluechai.com