Clianthus, commonly known as kakabeak, is a genus of flowering plants in the legume family Fabaceae, comprising two species of shrubs endemic to the North Island of New Zealand. They have striking clusters of red flowers which resemble the beak of the kākā, a New Zealand parrot. The plants are also known as parrot's beak, parrot's bill and lobster claw – all references to the distinctive flowers. There is also a variety with white to creamy coloured flowers called: "Albus," and a variety with rosy pink flowers called: "Roseus."

A shrub or bush is a small-to-medium-sized perennial woody plant. Unlike herbaceous plants, shrubs have persistent woody stems above the ground. Shrubs can be either deciduous or evergreen. They are distinguished from trees by their multiple stems and shorter height, less than 6–10 m (20–33 ft) tall. Small shrubs, less than 2 m (6.6 ft) tall are sometimes termed as subshrubs. Many botanical groups have species that are shrubs, and others that are trees and herbaceous plants instead.