Phyllostegia warshaueri is a rare species of flowering plant in the mint family known by the common name Laupahoehoe phyllostegia.

[1] It is a federally listed endangered species of the United States.

This plant grows only on Mauna Kea and the Kohala Mountains of Hawaii, where its habitat is wet forests.

This liana can grow to 3 meters in length.

It bears white flowers with pink upper lips.