Leaves: blades 6-15 cm × 2-4 mm, distalmost reduced to scales. Calyculus bractlets 1-5 mm. Involucres 12-18 × 4-5 mm. Phyllaries 16-20 mm, faces glabrous. Corollas 15-16 mm. Cypselae 8-10 mm; pappi 6-8 mm. 2n = 12.

Flowering Jul-Sep. Sandy soils of stream banks, dunes, and sand hills in prairies; 300-1500 m; Alta., Man., Sask.; Colo., Iowa, Kans., Minn ., Nebr., N.Dak., Okla., S.Dak., Tex., Utah, Wyo.

Shinnersoseris rostrata grows in the Prairies and Great Plains region of North America.