Stillingia

Description

Stillingia (Stillingia sylvatica) is a perennial herbaceous plant that belongs to the Euphorbiaceae family. It is native to the southeastern United States and is also known as Queen’s root, silverleaf, and cockup-hat. The plant has been used for centuries by Native Americans for its medicinal properties, which includes treating skin conditions, respiratory problems, and fever. It has also been used as a natural remedy for chronic constipation and syphilis.

Taxonomic Information

Appearance

The Stillingia plant can grow up to 3 feet in height and has a spread of up to 2 feet. It has a woody stem that is often reddish-brown and branches out from the base. The leaves are alternate, oval, and pointed, with a shiny dark green color on the upper surface and a lighter green color on the lower surface. The flowers are small, greenish-yellow, and arranged in spikes at the top of the stem. The plant produces a three-lobed fruit that is covered in spiny hairs.

Care Guide

Stillingia is a low-maintenance plant that can thrive in a variety of conditions. Here are some tips to help you care for your Stillingia plant:

• Water: Stillingia prefers well-draining soil and does not like to be overwatered. Water only when the soil is dry to the touch.
• Fertilization: Fertilize once a month during the growing season with a balanced fertilizer.
• Soil: Stillingia prefers slightly acidic to neutral soil with a pH between 6.0 and 7.0.
• Sunlight: Stillingia prefers full sun to partial shade, but can tolerate some shade.
• Hardiness Zones: Stillingia can grow in USDA hardiness zones 7 through 10.

Common Pests & Diseases

Stillingia is generally resistant to pests and diseases. However, it can be susceptible to root rot if overwatered. Here are some common pests and diseases to watch out for:

• Root rot
• Spider mites
• Mealybugs

Habitat

Stillingia is native to the southeastern United States and can be found growing in open woods, fields, and along roadsides. It prefers well-draining soil and can tolerate drought conditions.

Question and Answer

Q. Is Stillingia toxic?
A. Yes, all parts of the Stillingia plant are toxic if ingested. It should not be consumed without first consulting a healthcare professional.

Q. How can I propagate Stillingia?
A. Stillingia can be propagated by seed or by dividing the rootball in the fall or spring.

Q. Can Stillingia be grown in containers?
A. Yes, Stillingia can be grown in containers as long as they are large enough to accommodate the plant’s root system.

Q. How long does it take for Stillingia to flower?
A. Stillingia usually flowers in late summer or early fall, about 2-3 years after planting from seed.

Related Plants

• Euphorbia
• Codiaeum variegatum (Croton)
• Poinsettia pulcherrima (Poinsettia)

References

• Dirr, Michael A. Dirr’s Encyclopedia of Trees and Shrubs. Timber Press, 2011.
• Missouri Botanical Garden. “Stillingia sylvatica.” Accessed April 20, 2021. https://www.missouribotanicalgarden.org/PlantFinder/PlantFinderDetails.aspx?taxonid=281918
• The United States Department of Agriculture. “Stillingia sylvatica.” Accessed April 20, 2021. https://plants.usda.gov/core/profile?symbol=STSI