Euphorbia cyparissias - the cypress spurge - is a species native to dunes and grasslands in Europe, and introduced to North America, originally as an ornamental plant. It is a perennial growing to 40 cm (16 in) tall, with small and linear, 4 cm (1.6 in) long leaves and green-yellow petal-like bracts, maturing to purple or red from May to August. E. cyparissias is considered a noxious weed in many places, including Colorado in the United States.