Potentilla santolinoides, also known as silver mousetail, stellariopsis, Sierra mousetail and mousetail ivesia,[1] is a species of flowering plant in the rose family.[2] It is endemic to California where it grows in several mountain ranges, including the Sierra Nevada and Transverse Ranges.
Potentilla santolinoides is a perennial herb which can be somewhat different in appearance from many other mousetails. Each leaf is made up of many leaflets but they are tiny and overlap tightly to form a woolly, taillike, cylindrical leaf up to 10 centimeters long. The erect, naked stem reaches up to 40 centimeters in height and bears an inflorescence of flowers. Each flower is up to 8 millimeters wide and has large, round white petals above the much smaller, pointed sepals. There are 15 stamens and a single pistil.