Calyptridium pygmaeum, common name pygmy pussypaws, is a plant species endemic to California.

It has been reported from Riverside, San Bernardino, Inyo, Tulare and Fresno Counties, in pine and subalpine forests at elevations of 1900–3550 m.[3][4] Calyptridium pygmaeum is an annual herb.

Stems are horizontal, spreading out in various directions from the rootstock, each up to 8 cm (3.1 in) long.

Flowers form dense clusters at the ends of each of the branches.

The 4 petals are white, each up to 3 mm (0.12 in) long, remaining attached to the fruit.