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Description
Castanospermum Australe, commonly known as the Black Bean or Moreton Bay Chestnut, is a flowering plant native to Australia. It belongs to the Fabaceae family, one of the largest plant families, and is known for its large, glossy, dark green leaves and unique red and yellow flowers. The Black Bean is a slow-growing tree that can reach up to 40 meters in height and 1.5 meters in diameter.
Taxonomic Information
| Domain | Eukaryota |
| Kingdom | Plantae |
| Phylum | Spermatophyta |
| Class | Magnoliopsida |
| Order | Fabales |
| Family | Fabaceae |
| Genus | Castanospermum |
Appearance
The Black Bean has large, glossy, dark green leaves that can reach up to 20 cm in length. Its unique flowers are red and yellow and can grow up to 5 cm in length. The Black Bean produces large, hard, woody pods that are dark brown and contain up to ten seeds. The seeds are round and smooth, with a black or dark brown color and a hard outer shell.
Care Guide
The Black Bean is a hardy tree that requires minimal care. It prefers well-draining soil and full sun exposure. Water the tree regularly, keeping the soil moist but not waterlogged. Fertilize the tree once a year with a slow-release fertilizer. The Black Bean is hardy to USDA zones 9-11, and can tolerate temperatures as low as 20°F (-6°C).
Common Pests & Diseases
The Black Bean is relatively resistant to pests and diseases. However, it can be susceptible to root rot if overwatered. Common pests that may affect the Black Bean include spider mites and scale insects. These can be controlled with insecticidal soap or neem oil.
Habitat
The Black Bean is native to the east coast of Australia, from the New South Wales and Queensland border to the Atherton Tableland in Queensland. It can be found in rainforests, wet sclerophyll forests, and along river banks. The Black Bean is an important tree in the Australian landscape, providing food and habitat for a variety of animals.
Question and Answer
Q: Is the Black Bean a fast-growing tree?
A: No, the Black Bean is a slow-growing tree.
Q: Can the Black Bean tolerate frost?
A: No, the Black Bean is not frost-tolerant.
Q: What is the Black Bean used for?
A: The Black Bean is used for timber, furniture, and decorative purposes.
Q: Can the Black Bean be grown in a container?
A: Yes, the Black Bean can be grown in a container, but it will require regular pruning to keep its size manageable.
Related Plants
- Cassia fistula
- Delonix regia
- Albizia saman
- Acacia koa
References
- “Castanospermum Australe.” Australian Native Plants Society (Australia). Accessed 25 May 2021. https://anpsa.org.au/c-aus.html.
- “Castanospermum Australe.” Queensland Government. Accessed 25 May 2021. https://www.qld.gov.au/environment/plants-animals/plants/herbarium/tree-notes/castanospermum-australe.
- “Castanospermum Australe – Moreton Bay Chestnut.” Gardening Know How. Accessed 25 May 2021. https://www.gardeningknowhow.com/ornamental/trees/moreton-bay-chestnut/growing-moreton-bay-chestnut.htm.
