 Structures supporting the flower head and other structures underneath have evolved to attract pollinators with nectar, and with shapes and colors that function in a way petals and other flower parts do in other flowers.It is the only genus of plants that has all three kinds of photosynthesis, CAM, C3 and C4.Among laypeople, "Euphorbia" species are among the plant taxa most commonly confused with cacti, especially the stem succulents.