Poinsettia length. The colored bracts—which are most often flaming red but can be orange, pale green, cream, pink, white, or marbled—are often mistaken for flower petals because of their groupings and colors, but are actually leaves. The colors of the bracts are created through photoperiodism, meaning that they require darkness (12 hours at a time for at least five days in a row) to change color. At the same time, the plants require abundant light during the day for the brightest color. The flowers of the poinsettia are unassuming and do not attract pollinators. They are grouped within small yellow structures
Chelone (plant) Arkansas and Michigan, or the Atlantic coastal plain from South Carolina to Maryland. The relationship between the different populations is complicated and it appears that "C. obliqua" in fact has arisen several times from diploid ancestors of the other three species. The four species seem to have diverged recently. Chelone (plant) Chelone is a genus of four species of perennial herbaceous plants native to eastern North America. They all have similarly shaped flowers (which led to the name turtlehead due to their resemblance to the head of a turtle), which vary in color from white to red, purple or pink.