Euphorbia cyathophora.
 
Fire on the Mountain, also known as Painted Leaf and Wild Poinsettia, is an annual wildflower native to most regions of the United States where it can often be found growing in sand prairies, rocky glades and woodlands, and alongside the rocky banks of streams.

Plant grows to about 2 feet in height and produces red-tipped leaves and small green flowers that bloom from July through October.

Easy to grow and highly adaptable. Also self-seeds very easily, so once the plants are established they should continue to return year after year!