Here are the fancy ones, as I call them. Some are dyed or painted, and some have glitter.
An old Mexican legend tells the story of Pepita, who had no present to give the baby Jesus at the Christmas eve services. So she picked a small handful of weeds and put them at the bottom of the nativity, feeling embarrassed. Suddenly they burst into red flowers, and ever since then they were called "Flowers of the holy night."