Phacelia crenulata is a species of flowering plant in the waterleaf family, Hydrophyllaceae.

[2] Phacelia crenulata has an antitropical distribution, a type of disjunct distribution where a species exists at comparable latitudes on opposite sides of the equator, but not at the tropics.

[3] In South America, it is native to southern Peru, western Bolivia, and northern Chile.

[4][5] This species is an aromatic annual plant growing up to 80 centimeters tall.

The flower has a bell-shaped purple or blue corolla up to a centimeter long.