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Description
Sophora tetraptera, commonly known as the New Zealand Kowhai, is a small tree that belongs to the Fabaceae family. It is native to New Zealand and grows up to 10 meters tall. It has a slender trunk and branches with a smooth texture. The tree has pinnate leaves, which are dark green in color and measure about 10 centimeters in length. It produces bright yellow flowers, which bloom in spring and are followed by long seed pods that mature in autumn. The tree is an important part of New Zealand’s ecosystem, supporting native birds and insects.
Taxonomic Information
| Domain | Eukaryota |
|---|---|
| Kingdom | Plantae |
| Phylum | Tracheophyta |
| Class | Magnoliopsida |
| Order | Fabales |
| Family | Fabaceae |
| Genus | Sophora |
Appearance
The New Zealand Kowhai is a small tree with a slender trunk that can grow up to 10 meters tall. It has a smooth texture and branches that form a rounded crown. The leaves are pinnate, dark green, and measure about 10 centimeters in length. The tree produces bright yellow flowers, which bloom in spring and have a sweet fragrance. The flowers are followed by long seed pods that mature in autumn and contain several small seeds.
Care Guide
The New Zealand Kowhai requires well-drained soil and prefers full sun. It can tolerate a range of soil types and is hardy to USDA Zones 8-11. Water the tree regularly, especially during hot, dry periods. Fertilize the tree once a year in spring with a balanced fertilizer. Prune the tree in late winter or early spring to maintain its shape and remove any dead or damaged branches.
Common Pests & Diseases
The New Zealand Kowhai is generally resistant to pests and diseases. However, it can be affected by scales, mites, and aphids. These pests can be treated with insecticidal soap or neem oil. The tree can also be affected by root rot if the soil is poorly drained. Ensure that the soil is well-drained and avoid overwatering the tree.
Habitat
The New Zealand Kowhai is native to New Zealand, where it grows in forests, along streams, and in wetlands. It is an important part of New Zealand’s ecosystem, supporting native birds and insects. The tree is also cultivated as an ornamental plant in gardens and parks.
Question and Answer
1. What is the scientific name for the New Zealand Kowhai?
The scientific name for the New Zealand Kowhai is Sophora tetraptera.
2. What is the hardiness zone for the New Zealand Kowhai?
The New Zealand Kowhai is hardy to USDA Zones 8-11.
3. What is the best time to prune the New Zealand Kowhai?
The best time to prune the New Zealand Kowhai is in late winter or early spring.
4. What pests can affect the New Zealand Kowhai?
The New Zealand Kowhai can be affected by scales, mites, and aphids.
Related Plants
- Sophora microphylla
- Sophora secundiflora
- Sophora japonica
References
- “Sophora tetraptera.” New Zealand Plant Conservation Network. https://www.nzpcn.org.nz/flora/species/sophora-tetraptera/
- “Sophora tetraptera.” Missouri Botanical Garden. https://www.missouribotanicalgarden.org/PlantFinder/PlantFinderDetails.aspx?kempercode=a540
