Taraxia subacaulis is a species of evening primrose known by the common name diffuseflower evening primrose.

It is native to the western United States, where it grows in several habitat types, especially in mountainous areas.

It is a fleshy perennial herb growing from a taproot and usually lacking a stem.

The flower has yellow petals, each up to 1.5 centimeters long, and a large, bulbous stigma tip.

The fruit is a leathery capsule 1 to 3 centimeters long.