Ever heard of euphorbia plants? Of course you have, if you’ve ever purchased a poinsettia this time of year to brighten the house. Euphorbias (pronounced yew-for-bee-a), commonly called spurge, are a genus of plants that one writer described as shape shifters in the garden meaning that they come in many different forms and unique colors. As a genus of over 2,000 species found on every continent except Antarctica, they have adapted to a wide range of habitats and add unusual shapes and colors to garden plantings.