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Description
Omalotheca is a genus of flowering plants in the family Asteraceae. This genus includes about 30 species of perennial herbs, native to the Himalayas and Central Asia. The name Omalotheca is derived from the Greek words omalos, meaning “smooth,” and theke, meaning “case,” referring to the smooth bracts that enclose the flowerheads.
Taxonomic Information
| Domain | Eukaryota |
| Kingdom | Plantae |
| Phylum | Spermatophyta |
| Class | Magnoliopsida |
| Order | Asterales |
| Family | Asteraceae |
| Genus | Omalotheca |
Appearance
Omalotheca plants are typically low-growing, with leaves that are usually linear or spatulate in shape. The flowers are small and are arranged in dense clusters, with each cluster surrounded by smooth, leafy bracts. The color of the flowers varies depending on the species, but they are usually white, yellow, or pink.
Care Guide
Watering: Omalotheca plants prefer moist but well-drained soil. Water them regularly, but do not let the soil become waterlogged.Fertilization: These plants do not require frequent fertilization, but you can add a balanced fertilizer once a month during the growing season.Soil: Omalotheca plants prefer well-draining soil that is rich in organic matter.Sunlight: These plants prefer full sun to partial shade. In hot climates, they may require some afternoon shade to prevent scorching.Hardiness Zones: Omalotheca plants are hardy in USDA zones 5-9.
Common Pests & Diseases
Omalotheca plants are generally not prone to pests or diseases. However, they may occasionally be attacked by aphids, spider mites, or mealybugs. If you notice any pests, treat the plant with a mild insecticidal soap. These plants may also develop root rot if they are overwatered or planted in poorly-drained soil.
Habitat
Omalotheca plants are native to the Himalayas and Central Asia, where they grow in alpine meadows and rocky slopes. They prefer well-draining soil and cool temperatures.
Question and Answer
Q: What is the meaning of the name Omalotheca?
A: The name Omalotheca is derived from the Greek words omalos, meaning “smooth,” and theke, meaning “case,” referring to the smooth bracts that enclose the flowerheads.
Q: How often should I water my Omalotheca plant?
A: Omalotheca plants prefer moist but well-drained soil. Water them regularly, but do not let the soil become waterlogged.
Q: Are Omalotheca plants prone to pests or diseases?
A: Omalotheca plants are generally not prone to pests or diseases. However, they may occasionally be attacked by aphids, spider mites, or mealybugs.
Q: What is the hardiness zone for Omalotheca plants?
A: Omalotheca plants are hardy in USDA zones 5-9.
Related Plants
- Omalotheca acanthantha
- Omalotheca alpina
- Omalotheca caerulescens
- Omalotheca graminifolia
- Omalotheca sikkimensis
References
- “Omalotheca.” Wikipedia, Wikimedia Foundation, 14 Aug. 2021, en.wikipedia.org/wiki/Omalotheca.
- “Omalotheca.” Plants of the World Online, Kew Science, powo.science.kew.org/taxon/urn:lsid:ipni.org:names:324238-2.
