California macrophylla, commonly known as roundleaf stork's bill, is a species of flowering plant in the geranium family, Geraniaceae.

[2] It is native to the southwestern United States and northern Mexico, where it grows in open habitat such as grassland and scrub.

It is an annual herb that grows only a few centimeters high (1 inch), forming a patch of slightly lobed, somewhat kidney-shaped to rounded leaves on long, slender petioles.

The inflorescence is a fragile umbel of flowers with petals around a centimeter long (0.4 in) and white in color, often tinted pinkish or purplish.

[3] The fruit has a fuzzy base and a long, narrow style which may reach 5 cm (2 in) in length.