Brighamia rockii, known as the Molokai ohaha or Pua ʻala in Hawaiian, is a species of flowering plant in the bellflower family, Campanulaceae, that is endemic to the island of Molokaʻi in Hawaii.

Pua ʻala inhabits mesic shrublands and forests on rocky cliffs from sea level to 470 m (1,540 ft) on the island's northern windward coast.

Associated plants include ʻōhiʻa lehua (Metrosideros polymorpha), alaheʻe (Psydrax odorata), lama (Diospyros sandwicensis), ʻūlei (Osteomeles anthyllidifolia), and naupaka (Scaevola gaudichaudii).

Pua ʻala reaches a height of 1–5 m (3.3–16.4 ft) and has a succulent, trunk-like stem that tapers from the base.

Threats to its survival include habitat loss, competition with alien plants, predation by goats and deer, and a lack of pollinators.