Calochortus concolor is a species of flowering plant in the lily family known by the common name goldenbowl Mariposa lily. It is native to the mountains of southern California and northern Baja California, where it grows in the chaparral and forests of the slopes. It is a perennial herb growing an erect stem 30 to 60 centimeters tall. The waxy basal leaf is 10 to 20 centimeters long and withers at flowering. The flower cluster bears 1 to 7 erect bell-shaped flowers. Each flower has three sepals and three yellow petals with reddish areas near the bases. The fruit is a narrow, angled capsule up to 8 centimeters long.