Euphorbia rigida (Silver Spurge) Upright small shrub to 2 feet tall by 3 feet wide with attractive steel blue-green 1 1/2 inch lance shaped leaves arranged in tight spirals around the thick upright stems. In late winter and spring at branch tips appear the domed clusters of small green flowers with showy chartreuse-yellow bracts that age to a reddish tan color, as the flowering stems dies back. The leaves can take on these red hues in late fall as well. Plant in full to part sun in a soil that drains but tolerates poor dry rocky soil and irrigate occasionally to infrequently. Hardy to around 0°F. This plant is not attractive to browsing animals. Will seed itself around, but not too weedy and preventable by removing stems to their base after flowering with new growth suckering from the base.