Cox's mariposa lily

Calochortus coxii is a rare species of flowering plant in the lily family known by the common names Cox's mariposa lily and crinite mariposa lily. It is endemic to Oregon in the United States, where it is known only from Douglas County.

This rare plant was first described in 1988. It is a perennial herb growing 15 to 25 centimeters tall. The narrow leaves are up to 30 centimeters long and have hairy upper surfaces and hairless, shiny undersides. The inflorescence contains 1 to 7 showy bell-shaped flowers with petals up to 2.5 centimeters long. They are white with red striping and a large lavender spot at the base. The insides of the petals are coated in long yellow and white hairs. The fruit is a three-winged capsule measuring 3 to 4 centimeters long and containing beige seeds. Blooming occurs in mid-summer. When the plant is dormant between flowering seasons, it takes the form of a single leaf remaining above the ground.