costatifolia, known commonly as the Pierpoint Springs dudleya or the Pierpoint Springs liveforever, is a species of succulent plant in the family Crassulaceae, narrowly endemic to a locality in Tulare County, California, United States.

This species is a caespitose, clumping plant with small, densely packed rosettes only 1 to 5 cm wide.

Moran believed that due to the caespitose habit, it would be better suited as a subspecies Dudleya abramsii.

Rejected spellings of the epithet include:[3] Compared to the nearby Dudleya abramsii subsp.

The caespitose habit and exceedingly narrow leaves separate it as a whole from other Dudleya cymosa species.

[2] This species is narrowly distributed to the type locality in Tulare County, on a xeric southwest-facing pre-Cretaceous limestone outcrop.

The single population occurs on private land within the Sequoia National Forest, and is on relatively inaccessible habitat.

Nearby limestone outcrops do not bear this species, but Dudleya cymosa subsp.

It occurs in association with Hesperoyucca whipplei, Cercocarpus montanus, and Boechera sparsiflora.