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Description
Cynanchum Macrolobum, also known as large-leaved swallowwort, is a perennial plant species that belongs to the family Apocynaceae. It is native to North America and can be found growing in meadows, fields, and roadsides. The plant has a woody stem that can grow up to 6 feet tall, with large, green leaves that are oval-shaped and can reach up to 8 inches long.
Taxonomic Information
| Domain | Eukarya |
| Kingdom | Plantae |
| Phylum | Spermatophyta |
| Class | Angiospermae |
| Order | Gentianales |
| Family | Apocynaceae |
| Genus | Cynanchum |
Appearance
The large-leaved swallowwort has a woody stem that can grow up to 6 feet tall, with large, green leaves that are oval-shaped and can reach up to 8 inches long. The leaves have a glossy appearance and are arranged opposite to each other on the stem. The plant produces small, fragrant flowers that are pink or white in color and bloom in late summer. The fruit of the plant is a long, slender pod that contains numerous seeds.
Care Guide
Cynanchum Macrolobum is a hardy plant that requires minimal care. It thrives in well-draining soil and prefers full sun, although it can tolerate partial shade. The plant should be watered regularly, especially during dry periods, but avoid overwatering as it can cause root rot. Fertilize the plant once a year in the spring with a balanced fertilizer. The plant is hardy in USDA zones 4-8.
Common Pests & Diseases
Large-leaved swallowwort is relatively pest-free but can be susceptible to leaf spot and powdery mildew. Leaf spot is a fungal disease that causes brown spots on the leaves, while powdery mildew is a fungal disease that causes a white, powdery coating on the leaves. Both diseases can be treated with a fungicide. The plant may also attract aphids, which can be controlled with insecticidal soap or neem oil.
Habitat
Cynanchum Macrolobum is native to North America and can be found growing in meadows, fields, and roadsides. The plant prefers well-draining soil and full sun but can tolerate partial shade. It is hardy in USDA zones 4-8.
Question and Answer
Q: Can Cynanchum Macrolobum be grown in containers?
A: Yes, the plant can be grown in containers as long as the container has adequate drainage and the plant is watered regularly.
Q: Is Cynanchum Macrolobum toxic?
A: Yes, the plant is toxic if ingested and can cause gastrointestinal distress in humans and animals.
Q: How often should Cynanchum Macrolobum be fertilized?
A: The plant should be fertilized once a year in the spring with a balanced fertilizer.
Q: Does Cynanchum Macrolobum attract pollinators?
A: Yes, the plant produces small, fragrant flowers that attract bees and butterflies.
Related Plants
- Cynanchum laeve
- Cynanchum louiseae
- Cynanchum rossicum
References
- Flora of North America North of Mexico, Vol. 21: Magnoliophyta: Asteridae (in part): Gentianales (in part) by Flora of North America Editorial Committee
- Cynanchum Macrolobum, Large-leaved Swallow-wort by Illinois Wildflowers
- Cynanchum Macrolobum by Missouri Botanical Garden
