硬骨草属（学名：Holosteum）是石竹科下的一个属，为一年生草本植物。该属共有6种，分布于东半球北温带。

Holosteum is a genus of plants in the Pink family (Caryophyllaceae) with 3 or 4 species native from southern Europe through central and south western Asia and in Africa. They are herbs with an annual life span, some growing as winter annuals. They have slender roots and thin stems that are upright or ascending. The genus name was given by Linnaeus, and named because of the sprawling nature of the plants: Greek holos, meaning whole or all, and osteon, meaning bone, because of the frailty of the plant.