The Channel Islands Morning-Glory (Calystegia purpurata ssp. saxicola) is a rare and endangered plant species native to the Channel Islands of California. It is a member of the Convolvulaceae family and is known for its large, showy flowers and unique adaptations to its island habitat.

Description: The Channel Islands Morning-Glory is a herbaceous perennial vine that grows up to 2 meters in length. It has heart-shaped leaves that are 5-10 centimeters long and 3-7 centimeters wide. The flowers are large, funnel-shaped, and range in color from pink to purple. They are 5-10 centimeters in diameter and bloom from April to August. The plant also produces a large, fleshy, underground storage organ known as a caudex, which allows it to survive during periods of drought.

Habitat and Distribution: The Channel Islands Morning-Glory is endemic to the Channel Islands of California and is found on Santa Barbara, San Clemente, San Nicolas, and Santa Catalina Islands. It is typically found in coastal scrub habitats and rocky cliffs, where it can climb on other plants or scramble over rocks.

Ecological and Cultural Importance: The Channel Islands Morning-Glory is an important plant species in its island ecosystem. It is a food source for pollinators such as bees and butterflies, and its seeds are consumed by birds and small mammals. The plant also has cultural significance for the Chumash people, who have traditionally used it for medicinal and ceremonial purposes.

Conservation Status: The Channel Islands Morning-Glory is listed as endangered under the Endangered Species Act. Its population has been severely impacted by habitat loss and degradation, as well as by competition from invasive plant species. Conservation efforts are focused on protecting its remaining habitat, controlling invasive species, and restoring degraded habitat.