Overview
The Karaka Tree (Corynocarpus laevigatus), known in Māori heritage as the Karaka or Kōpī, is a handsome, salt-tolerant evergreen canopy tree endemic to coastal New Zealand. Forming dense groves along coastal cliffs and estuaries, this venerable tree produces heavy clusters of brilliant orange drupes that served as an indispensable dietary staple for Māori and Moriori communities through ingenious, complex detoxifying culinary preparations.
Biology and Physical Characteristics
Corynocarpus laevigatus reaches up to 50 feet in height with a dense, rounded crown of leathery, glossy dark-green leaves that reflect maritime sunlight and resist salt spray. In spring, it produces erect panicles of small greenish-white flowers. By late summer, these develop into large, fleshy oval drupes measuring up to two inches long that ripen into a radiant glowing orange. While the sweet outer pulp is completely harmless, the large inner seed kernel contains lethal quantities of karakin, a potent neurotoxin that causes convulsions and permanent paralysis if ingested raw.
Behavior and Ecology
The Karaka Tree is an ecological anchor in New Zealand’s coastal ecosystems. Its heavy fruit crops provide a critical late-summer feast for native fruit-eating birds, particularly the Kererū (New Zealand Pigeon), which is the only native bird with a gape wide enough to swallow the fruits whole. Because the Kererū digests only the fleshy pulp and voids the hard, poisonous kernel unharmed, it acts as the primary seed disperser for the tree across coastal ranges.
Conservation and Human Impact
Ranked as Least Concern by the IUCN Red List, the Karaka is abundant across northern New Zealand. It holds profound cultural significance, having been deliberately cultivated near ancestral settlements (pā) for centuries. In certain South Island and offshore habitats where it was translocated, its dense shade and prolific regeneration have led to regional management discussions regarding native understory displacement, while remaining strictly cherished in its historical coastal home.
Interesting Factoid
The raw kernels of the Karaka Tree contain the potent neurotoxin karakin, yet ancestral Māori communities developed an ingenious method of baking the fruit in underground earth ovens (hāngī) for days to break down the poison and create a nutritious staple food.
Last updated: October 2026