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Description
Tristemma is a genus of flowering plants that belong to the family Gentianaceae. The genus consists of about 15 species of evergreen shrubs or small trees that are native to Southeast Asia, including India, Thailand, Malaysia, and Indonesia. The plants are known for their showy flowers that bloom in clusters, and their glossy, dark green leaves.
Taxonomic Information
| Domain | Eukaryota |
| Kingdom | Plantae |
| Phylum | Spermatophyta |
| Class | Magnoliopsida |
| Order | Gentianales |
| Family | Gentianaceae |
| Genus | Tristemma |
Appearance
Tristemma plants have glossy, dark green leaves that are oval-shaped and arranged in opposite pairs along the stem. The flowers are trumpet-shaped and have five petals that are fused together at the base. They come in a range of colors, including pink, red, white, and yellow. The fruit is a capsule that splits open when ripe to release the seeds.
Care Guide
Tristemma plants require moderate watering and well-draining soil that is rich in organic matter. They prefer partial to full sunlight and can be grown in hardiness zones 9-11. Fertilize the plants with a balanced fertilizer once a month during the growing season. Prune the plants after flowering to maintain their shape.
Common Pests & Diseases
Tristemma plants are susceptible to several pests and diseases, including mealybugs, scale insects, spider mites, and root rot. Watch out for signs of infestation, such as yellowing leaves, stunted growth, and wilting.
Habitat
Tristemma plants are native to Southeast Asia, including India, Thailand, Malaysia, and Indonesia. They grow in a range of habitats, including forests, hillsides, and riverbanks.
Question and Answer
Q: Can Tristemma plants grow in full shade?
A: Tristemma plants prefer partial to full sunlight and may not thrive in full shade.
Q: How often should I fertilize Tristemma plants?
A: Fertilize the plants with a balanced fertilizer once a month during the growing season.
Q: What is the hardiness zone for Tristemma plants?
A: Tristemma plants can be grown in hardiness zones 9-11.
Q: How do I prune Tristemma plants?
A: Prune the plants after flowering to maintain their shape.
Related Plants
- Gentiana
- Centaurium
- Exacum
- Swertia
References
- Janssens, S. B., & Smets, E. F. (2004). A revision of the genus Tristemma (Gentianaceae). Systematic Botany, 29(1), 83-96.
- Kiew, R. (2006). Tristemma. Flora Malesiana, 17, 51-54.
- Stevens, P. F. (2001 onwards). Gentianaceae. Angiosperm Phylogeny Website. Version 14, July 2017.
