kawakawa
1. (noun) kawakawa, pepper tree, Macropiper excelsum - a small, densely-branched tree with heart-shaped leaves. Found throughout the North Island and as far south as Banks Peninsula. Used for ceremonies, including removing tapu, for medicinal purposes, and as a symbol of death.
(Te Māhuri Textbook (Ed. 2): 124-125;)
2. (noun) dark to rich green variety of greenstone - resembles the leaves of the kawakawa shrub.