Potentilla saxosa, commonly known as rock mousetail and rock ivesia, is a species of flowering plant in the rose family.[1] It is native to the mountains and deserts of central and southern California and northern Baja California, where it grows in cracks and crevices in rock faces and slopes.
Potentilla saxosa is a clumpy perennial herb with hanging leaves and stems. Each leaf is a flat strip or cluster of rounded, lobed leaflets. The green to reddish stem is up to 30 centimeters long and bears an inflorescence of clustered flowers. Each flower is almost a centimeter wide and has hairy pointed sepals and smaller rounded to spoon-shaped yellow petals. In the center of the flower are up to 40 stamens and many pistils. The fruit is a tiny pale achene.