Potentilla callida, commonly known as Tahquitz mousetail, is a rare species of flowering plant in the rose family.

[1] The plant is endemic to the San Jacinto Mountains of Riverside County, California, where it is known from only two occurrences.

Potentilla callida is a small perennial herb which forms matted patches of hanging foliage on cliff faces.

The thin, green, hanging stems grow up to 15 centimeters long and bear an inflorescence of several flowers.

Each flower has five hairy, pointed sepals and five round to oval white petals.