Within the U.S., there are 73 native species of Milkweed. Each of the species is region-specific (grows in a particular part of the U.S.) The color of blooms is dependent on what species the plant is—colors and vibrancy range in whites, pinks, greens, purples, oranges, reds, and yellows. The flower’s petal-shapes also differ among species. Some flowers look like stars, while others have dainty rounded umbels.