Contents
Description
Callistachys is a genus of flowering plants from the family Proteaceae, commonly known as the silky oaks. It is native to Australia and Papua New Guinea, where it grows in tropical and subtropical rainforests. The genus comprises five species of trees that are prized for their ornamental value and used in landscaping and as shade trees.
Taxonomic Information
| Domain | Eukaryota |
|---|---|
| Kingdom | Plantae |
| Phylum | Spermatophyta |
| Class | Magnoliopsida |
| Order | Proteales |
| Family | Proteaceae |
| Genus | Callistachys |
Appearance
Callistachys trees are evergreen, with a dense canopy of glossy, dark green leaves that can reach up to 30 cm in length. The trees can grow up to 30 meters tall and have a straight trunk with rough bark. The flowers are large and showy, with a cylindrical or conical shape, and can range in color from yellow to orange or red. The fruit is a woody capsule that contains numerous small seeds.
Care Guide
Callistachys trees are relatively easy to care for and can be grown in a variety of soil types. They prefer well-draining soils and moderate watering, and should be fertilized with a balanced fertilizer during the growing season. The trees require full sun to partial shade and are hardy in USDA zones 10 to 11.
Common Pests & Diseases
Callistachys trees are susceptible to a number of pests and diseases, including scale insects, spider mites, and root rot. Regular inspection and treatment with insecticides and fungicides can help prevent infestations and diseases.
Habitat
Callistachys trees are native to rainforests and can be found in Australia and Papua New Guinea. They grow in a variety of soil types and are adapted to the humid and tropical climate of the region.
Question and Answer
Q: How often should I water my Callistachys tree?
A: Callistachys trees require moderate watering, and the soil should be allowed to dry out slightly between waterings.
Q: What is the best fertilizer for Callistachys trees?
A: A balanced fertilizer, such as a 10-10-10 NPK blend, is recommended for Callistachys trees.
Q: Can Callistachys trees be grown in containers?
A: Yes, Callistachys trees can be grown in containers, but they require regular watering and fertilization, and may need to be repotted as they grow.
Q: Are Callistachys trees cold hardy?
A: Callistachys trees are hardy in USDA zones 10 to 11 and can tolerate some cold, but may require protection from frost and freezing temperatures.
Related Plants
- Macadamia
- Grevillea
- Protea
- Banksia
References
- Encyclopedia of Australian Plants: Proteaceae 1 by Wrigley and Fagg
- Proteaceae of the World by Tony Rodd
- Flora of Australia Online: Callistachys
