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Description
Oenothera Rubricaulis, commonly known as red-stemmed evening primrose, is a flowering plant species in the Onagraceae family. It is native to North America and can be found in various habitats, including prairies, meadows, and open woods. This perennial plant can grow up to 3 feet tall and spread up to 2 feet wide. It produces bright yellow, cup-shaped flowers that bloom from late spring to early fall. The leaves are lance-shaped and can grow up to 4 inches long.
Taxonomic Information
| Domain | Eukaryota |
| Kingdom | Plantae |
| Phylum | Angiosperms |
| Class | Eudicots |
| Order | Myrtales |
| Family | Onagraceae |
| Genus | Oenothera |
Appearance
Oenothera Rubricaulis has a striking appearance, with its bright yellow flowers and red stems. The flowers are about 2 inches wide and bloom in clusters at the top of the stem. They have four petals and a distinctive cross-shaped stigma in the center. The leaves are arranged alternately on the stem and are lance-shaped with slightly serrated edges. The plant can grow up to 3 feet tall and has a spread of up to 2 feet wide. It is a great addition to any garden, providing a pop of color and texture.
Care Guide
Oenothera Rubricaulis is a low-maintenance plant that can thrive in a variety of conditions. Here are some tips for caring for this plant:
- Water: Water regularly, especially during hot and dry weather. Make sure the soil is well-drained to prevent waterlogging.
- Fertilization: Fertilize once a month during the growing season with a balanced fertilizer.
- Soil: Plant in well-draining soil that is rich in organic matter.
- Sunlight: Plant in full sun to partial shade for best results.
- Hardiness Zones: Oenothera Rubricaulis is hardy in zones 5-9.
Common Pests & Diseases
Oenothera Rubricaulis is relatively resistant to pests and diseases. However, it may be susceptible to the following:
- Aphids: These small, soft-bodied insects can suck the sap from the plant and cause stunted growth and yellowing leaves. Spray with insecticidal soap to control.
- Spider mites: These tiny insects can cause yellowing and browning of the leaves. Spray with insecticidal soap or neem oil to control.
- Crown rot: This fungal disease can cause the plant to wilt and die. To prevent, plant in well-draining soil and avoid overwatering.
Habitat
Oenothera Rubricaulis is native to North America and can be found in a variety of habitats, including prairies, meadows, and open woods. It prefers well-draining soil and full sun to partial shade. It is a great addition to a wildflower garden or meadow.
Question and Answer
Q: Is Oenothera Rubricaulis a perennial or annual plant?
A: Oenothera Rubricaulis is a perennial plant.
Q: How do I propagate Oenothera Rubricaulis?
A: Oenothera Rubricaulis can be propagated by division in the spring or fall.
Q: Can Oenothera Rubricaulis tolerate drought?
A: Oenothera Rubricaulis is relatively drought-tolerant, but it should be watered regularly during hot and dry weather.
Q: How do I deadhead Oenothera Rubricaulis?
A: Deadhead Oenothera Rubricaulis by cutting back the spent flowers to encourage more blooms.
Related Plants
- Oenothera biennis
- Oenothera fruticosa
- Oenothera macrocarpa
- Oenothera speciosa
References
- https://www.wildflower.org/plants/result.php?id_plant=OERU
- https://www.gardeningknowhow.com/ornamental/flowers/evening-primrose/red-stemmed-evening-primrose-care.htm
- https://www.gardenia.net/plant/oenothera-rubricaulis-red-stemmed-evening-primrose
