Rafinesquia

Description

Rafinesquia is a genus of flowering plants in the sunflower family, native to North America. The genus was named after Constantine Samuel Rafinesque, a French-American naturalist. There are only two species of Rafinesquia, Rafinesquia californica, and Rafinesquia neomexicana. These plants are annual or biennial herbs with erect stems.

Taxonomic Information

Appearance

Rafinesquia plants have hairy, rough stems that can grow up to 3 feet tall. The leaves are alternate and deeply lobed, with toothed edges. The flowers are small, yellow, and tubular, with 5 petals. The fruit is an achene, which is a dry, one-seeded fruit that does not open to release the seed. The plant blooms from April to August.

Care Guide

Water

Rafinesquia plants prefer well-draining soil that is kept evenly moist. They do not tolerate drought well and should be watered regularly.

Fertilization

Rafinesquia plants do not require fertilizer but can benefit from a balanced, slow-release fertilizer applied in the spring.

Soil

Rafinesquia plants prefer well-draining soil that is rich in organic matter. They can tolerate a range of soil types, including sandy and clay soils.

Sunlight

Rafinesquia plants prefer full sun but can tolerate some shade.

Hardiness Zones

Rafinesquia plants are hardy in USDA zones 5-9.

Common Pests & Diseases

Rafinesquia plants are relatively pest-free but can be susceptible to powdery mildew and rust. These can be treated with fungicides. Aphids and spider mites can also be a problem, and can be controlled with insecticidal soap.

Habitat

Rafinesquia plants are found in a variety of habitats, including grasslands, meadows, and open woods. They are native to North America and are found throughout the western United States.

Question and Answer

Q: Are Rafinesquia plants deer-resistant?

A: Rafinesquia plants are not typically deer-resistant.

Q: Can Rafinesquia plants be grown in containers?

A: Yes, Rafinesquia plants can be grown in containers as long as the container is large enough to accommodate the plant’s root system.

Q: Are Rafinesquia plants toxic to pets?

A: There is no information to suggest that Rafinesquia plants are toxic to pets.

Q: How often should Rafinesquia plants be fertilized?

A: Rafinesquia plants do not require frequent fertilization but can benefit from a balanced, slow-release fertilizer applied in the spring.

Related Plants

• Aster
• Coreopsis
• Goldenrod
• Sunflower

References

• “Rafinesquia.” Flora of North America.
• “Rafinesquia.” Missouri Botanical Garden.
• “Rafinesquia.” Plant Finder. Sunset.