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Description
Gelsemium is a genus of flowering plants in the family Gelsemiaceae. It is native to North and Central America, and East Asia. The most commonly known species is Gelsemium sempervirens, also known as Carolina jasmine, yellow jessamine or evening trumpetflower. This plant produces fragrant yellow flowers and is commonly used in traditional medicine to treat various ailments. However, it is toxic and can cause serious health problems if ingested.
Taxonomic Information
| Domain | Eukaryota |
|---|---|
| Kingdom | Plantae |
| Phylum | Spermatophyta |
| Class | Magnoliopsida |
| Order | Gentianales |
| Family | Gelsemiaceae |
| Genus | Gelsemium |
Appearance
Gelsemium sempervirens is an evergreen vine that can grow up to 20 feet long. It has shiny, dark green leaves that are arranged in pairs along the stem. The flowers are trumpet-shaped and can grow up to 2 inches long. They are bright yellow and have a sweet fragrance. The fruit is a small capsule that contains numerous seeds.
Care Guide
Gelsemium sempervirens prefers moist, well-drained soil and partial to full sun. It can tolerate a wide range of soil types, but it prefers slightly acidic soil. Water the plant regularly, especially during the growing season. Fertilize with a balanced fertilizer in the spring and summer. Gelsemium sempervirens is hardy in USDA zones 7-10.
Common Pests & Diseases
Gelsemium sempervirens is susceptible to spider mites, scale insects, and whiteflies. It can also be affected by fungal diseases such as leaf spot and powdery mildew. To control pests, use insecticidal soap or neem oil. To prevent fungal diseases, avoid overhead watering and provide good air circulation.
Habitat
Gelsemium sempervirens is native to the southeastern United States, where it grows in wooded areas and along streams. It is also found in Central America and East Asia. It is commonly cultivated as an ornamental plant.
Question and Answer
Q: Is Gelsemium sempervirens toxic?
A: Yes, all parts of the plant are toxic if ingested and can cause serious health problems.
Q: How often should I water Gelsemium sempervirens?
A: Water the plant regularly, especially during the growing season.
Q: What is the hardiness zone for Gelsemium sempervirens?
A: Gelsemium sempervirens is hardy in USDA zones 7-10.
Q: What is the common name for Gelsemium sempervirens?
A: The common names are Carolina jasmine, yellow jessamine, or evening trumpetflower.
Related Plants
- Gelsemium rankinii
- Gelsemium elegans
- Gelsemium nitidum
References
- “Gelsemium sempervirens (L.) J.St.-Hil.” Plants of the World Online, Kew Science.
- “Gelsemium sempervirens.” Missouri Botanical Garden.
- “Yellow Jessamine.” Clemson Cooperative Extension.
