Slippery Elm

(Ulmus rubra)

Basic Identification

Common Names
Slippery elm
Red elm
Moose elm
Indian elm
Sweet elm

Botanical Name
Ulmus rubra

Plant Family
Ulmaceae (Elm family)

Parts Used

• Inner bark (primary medicinal part)

The inner bark is rich in mucilage and is the primary medicinal material used in herbal preparations.

Habitat and Native Range

Slippery elm is native to:
• eastern North America
• central North America

It commonly grows in:
• deciduous forests
• woodland edges
• moist slopes
• river valleys
• rich well-drained soils

Its native range includes much of:
• the eastern United States
• the Midwest
• parts of southern Canada

Overview

Slippery elm is one of the classic soothing demulcent herbs in Western and North American herbalism. Known for its rich mucilage content, it is most commonly used to calm irritated tissues, support digestive health, and soothe inflamed mucous membranes.

Unlike strongly stimulating herbs, slippery elm works primarily by coating, moistening, and protecting tissues. It is especially valuable in patterns involving dryness, irritation, inflammation, and tissue sensitivity throughout the digestive and respiratory systems.

Slippery elm has long been regarded as a gentle restorative herb suitable for a wide range of individuals, including children, the elderly, and those recovering from illness or digestive weakness.

Basic Uses

Slippery elm is commonly used for:

• Sore throat and throat irritation
• Dry irritated coughs
• Digestive irritation
• Gastric inflammation
• Acid irritation and reflux support
• Irritable bowel patterns
• Occasional diarrhea
• Recovery nutrition and convalescence
• Dry inflamed mucosal tissues

Slippery elm is especially associated with:
• soothing irritated tissues
• moistening dryness
• gastrointestinal support
• mucosal protection
• nutritive demulcent support

Botanical Description / Morphology

Growth Habit – Medium-sized deciduous tree, typically 40–70 feet tall, with a broad rounded crown and spreading branches.

Trunk & Bark –
• Gray-brown outer bark with deep furrows
• Inner bark reddish-brown and mucilaginous when moistened
• Rough textured surface
• Mature bark develops layered ridges

Branches & Twigs –
• Twigs stout and slightly fuzzy
• Buds dark brown and hairy
• Young branches often rough-textured

Leaves – Arrangement: Alternate
Shape: Oval to oblong with pointed tips
Margin: Doubly serrated
Surface: Rough sandpaper-like upper surface, softer underside
Texture: Thick and coarse

Venation – Strong central vein with prominent parallel side veins

Flowers – Type: Small clustered wind-pollinated flowers
Color: Reddish-green
Bloom Time: Early spring before leaves fully emerge

Seeds – Flat winged samaras developing in clusters after flowering

Roots – Broad spreading root system typical of mature elm trees

Key Identifying Features

• Rough textured leaves
• Uneven leaf bases
• Reddish mucilaginous inner bark
• Deeply furrowed bark
• Slippery gel texture when inner bark is moistened

Similar Species / Lookalikes

• American elm (Ulmus americana)
→ smoother inner bark, less mucilaginous

• Winged elm (Ulmus alata)
→ corky winged stems and smaller leaves

• Siberian elm (Ulmus pumila)
→ smoother leaves and less rough bark texture

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The information provided on this website is for educational purposes only and is not intended to diagnose, treat, cure, or prevent any disease.

Herbal remedies can affect individuals differently and may interact with medications or medical conditions. Always consult a qualified healthcare professional before beginning any new herbal regimen, especially if you are pregnant, nursing, taking medications, or have a medical condition.

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