Corynocarpus

Description

Corynocarpus is a genus of evergreen trees and shrubs native to New Zealand. There are only two known species of Corynocarpus: Corynocarpus laevigatus and Corynocarpus similis. Both species are commonly known as karaka, and they are culturally significant to the indigenous Māori people of New Zealand.

Taxonomic Information

Appearance

Corynocarpus trees can grow up to 30 meters tall, but they are often smaller in cultivation. They have glossy, dark green leaves that are leathery and oblong in shape. In late spring, Corynocarpus trees produce small, greenish-yellow flowers that are followed by orange-yellow, fleshy fruit that resemble plums. The fruit is edible but can be toxic if not properly prepared.

Care Guide

Water

Corynocarpus trees prefer moist but well-drained soil. They should be watered regularly during the growing season, but be careful not to overwater as this can lead to root rot.

Fertilization

Fertilize Corynocarpus trees once a year in the spring with a slow-release fertilizer.

Soil

Corynocarpus trees prefer slightly acidic soil that is rich in organic matter.

Sunlight

Corynocarpus trees prefer full sun to partial shade.

Hardiness Zones

Corynocarpus trees are hardy in USDA zones 9-11.

Common Pests & Diseases

Corynocarpus trees are relatively pest and disease resistant. However, they can be susceptible to scale insects, mealybugs, and spider mites. To prevent these pests, keep the tree healthy and well-watered, and prune away any damaged or diseased branches.

Habitat

Corynocarpus trees are native to New Zealand, where they are found in coastal and lowland forests. They prefer well-drained soil and can tolerate salt spray.

Question and Answer

Q: Are Corynocarpus trees poisonous?

A: The fruit of the Corynocarpus tree is edible but can be toxic if not properly prepared. The Māori people of New Zealand have traditionally roasted the fruit to remove the toxins before eating them.

Q: Can Corynocarpus trees be grown in containers?

A: Yes, Corynocarpus trees can be grown in containers. However, they will require regular pruning to keep them from outgrowing the container.

Q: How fast do Corynocarpus trees grow?

A: Corynocarpus trees are slow-growing and can take up to 10 years to reach their full height.

Q: Can Corynocarpus trees tolerate salt spray?

A: Yes, Corynocarpus trees can tolerate salt spray and are often found growing near the coast.

Related Plants

• Phyllocladus trichomanoides
• Podocarpus totara
• Agathis australis

References

• “Corynocarpus.” New Zealand Plant Conservation Network. http://www.nzpcn.org.nz/flora_details.aspx?ID=479
• “Corynocarpus.” Plants of the World Online. http://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:77078601-1