Lithophragma bulbiferum Lithophragma glabrum is a slender perennial western North American mountain plant in the Saxifrage family (Saxifragaceae), known by the common names bulbous woodland star, bulbiferous prairie-star, smooth woodland star, and smooth rockstar.

[1][2] It is native to western North America from British Columbia to California and Saskatchewan to Colorado, where it grows in many types of habitat.

It is a rhizomatous perennial herb growing erect or leaning with a slender glandular-pubescent flowering stem.

The stem bears 1 to 7 flowers, each in a cuplike calyx of hairy red or green sepals.

The five petals are white or pink-tinged, up to about 7 millimeters long, and divided into several, often five, toothlike lobes.