Acmispon parviflorus, synonym Lotus micranthus, is a species of legume.

It is native to western North America from British Columbia to southern California, where it is known from many types of habitat.

It is a hairy to hairless annual herb lined with leaves each made up of small oval leaflets.

Each is an ephemeral pinkish pealike bloom under a centimeter long.

The fruit is a narrow, hairless, wavy-edged legume pod up to about 2.5 centimeters long.