A friend called it butterfly plant because it's small yellow petals turns to green butterfly-like shape. But i'm not sure if it's real name is butterfly
Sorry I missed this post earlier, Olga. I believe your plant is Mascagnia macroptera, commonly called "Butterfly pea vine", "Yellow Orchid vine", or "Gallinita".
Thank's!! I just bought my 2nd pot of this butterfly plant the other day, i hope to get some seeds from this plant so i could share it with you guys.