Calochortus catalinae is a species of mariposa lily known by the common name Santa Catalina mariposa lily. It is endemic to Southern California where it is found along the coastline, and especially on the Channel Islands. This plant produces long basal leaves and tall, branching stems up to 60 centimeters high. The purple-tinted sepals are up to 3 centimeters long and the longer petals are usually white or very pale pink with a blotch of purple or deep red at the bases. The bowl of the petals may have sparse long hairs. The anthers are usually light in color, often pink.