Onosmodium hispidissimum Mackenzie Lithospermum parviflorum, commonly called Eastern Prairie Marbleseed,[1] is a species of flowering plant in the forget-me-not family.

It produces a cyme of cream colored flowers in late spring and early summer.

Its preferred habitat, somewhat dry calcareous woodlands, barrens, and glades,[1] has been heavily impacted by agriculture and other land-use changes.

[3] It can be distinguished from the similar looking Lithospermum bejariense by having shorter corollas (6-10mm) and nutlets that form a collar around the base.

It can be distinguished from the cedar glade endemic Lithospermum molle by having leaves with erect pustular-based hairs.