Euphorbia myrsinitis is an evergreen plant with gray-green leaves arranged in a tight spiral on trailing stems. Makes an excellent ground cover. Use Donkeytail over rocks on a slope or in the border. Bright chartreuse-green flowers in late spring contrast beautifully with the succulent-looking foliage. Caution: The milky white sap of all Spurge may cause mild to severe skin irritation or allergic reaction.