And i found this one, also blue taken in Thailand, the double petalled butterfly pea, Clitoria ternatea. (I agree with Autumn Belle who provided the link, thanks.)
The photos related to the Clitoria ternatea which is common in the Philippines is a weed. Although it is normally growing in marginal areas, i love to see its purple flowers along its vines, generously exposed to humans and the bees for pollination. This is called Centrosema pubescens. I am sure you will recognize its common relationship with Clitoria. Both are legumes, both are climbing herbs, blue or purple and most of all the scientific name denotes a "body part" as Autumn Belle said. Keep looking at these beautiful flowers and i am sure the name is obvious. In the first, it is the genus and in the 2nd flower it is in the species.
Centrosema's color is light purple, while the shape is almost the same as that of Clitoria. It is used also as feeds for livestock being source of protein like the other leguminous crops.
Although both are climbing vines, the morphology of vegetative plant parts like the leaves differ significantly. (Sorry with the blurry photo). By now you have deciphered the Clitoria and pubescens. Whew!