Rhus

Description

Rhus is a genus of flowering plants commonly known as sumac. The genus is native to subtropical and temperate regions of the world. Rhus species can be either deciduous or evergreen, and they range in size from small shrubs to trees up to 35 meters tall. The leaves are usually pinnately compound, and the flowers are small and greenish. The fruit is a red or brown drupe that is covered in hairs and contains a single seed.

Taxonomic Information

Appearance

Rhus plants can vary greatly in appearance depending on the species. They can be small shrubs or large trees, and their leaves can be either deciduous or evergreen. The leaves are usually pinnately compound, with each leaflet being serrated. The flowers are small and greenish, and they are often arranged in clusters. The fruit is a red or brown drupe that is covered in hairs and contains a single seed.

Care Guide

Rhus plants are generally easy to care for, and they can be grown in a variety of conditions. Here are some tips for caring for Rhus:

• Water: Rhus plants prefer well-draining soil that is moist but not waterlogged. Water them deeply once a week, or more often during hot, dry weather.
• Fertilization: Fertilize Rhus plants in the spring with a slow-release fertilizer that is high in nitrogen.
• Soil: Rhus plants prefer well-draining soil that is slightly acidic.
• Sunlight: Rhus plants prefer full sun to partial shade.
• Hardiness Zones: Rhus plants are hardy in USDA zones 4-9.

Common Pests & Diseases

Rhus plants are generally resistant to pests and diseases, but they can be susceptible to some problems. Here are some common pests and diseases that can affect Rhus:

• Scale: Scale insects can infest Rhus plants and cause stunted growth and yellowing leaves.
• Powdery Mildew: Powdery mildew can cause a white powdery coating on the leaves of Rhus plants.
• Canker: Canker can cause sunken, discolored patches on the bark of Rhus plants.

Habitat

Rhus plants are native to subtropical and temperate regions of the world. They can be found in a variety of habitats, including forests, grasslands, and deserts. Rhus species are important components of many ecosystems, and they are often used in landscaping and horticulture.

Question and Answer

Q: Can Rhus plants be grown in containers?

A: Yes, Rhus plants can be grown in containers as long as they have enough room to grow and are provided with the proper care.

Q: Are Rhus plants toxic to pets?

A: Yes, some Rhus species can be toxic to pets if ingested. It is important to keep pets away from Rhus plants and to seek veterinary care if they are exposed to them.

Q: How often should I prune Rhus plants?

A: Rhus plants should be pruned in late winter or early spring before new growth begins. Prune them to remove any dead or diseased wood, and to shape the plant if necessary.

Q: Can Rhus plants be used for medicinal purposes?

A: Yes, some Rhus species have been used in traditional medicine to treat a variety of ailments, including fever, diarrhea, and skin disorders.

Related Plants

• Toxicodendron
• Cotinus
• Metopium

References

• Flora of North America: Rhus
• Missouri Botanical Garden: Rhus
• RHS: Rhus