Botanical Overview
Black Haw (Viburnum prunifolium) belongs to the Caprifoliaceae family. While not among the most extensively documented medicinal plants, this species has recorded uses that warrant attention from researchers and practitioners. This species belongs to the Caprifoliaceae family, a group of flowering plants.
General Description
Viburnum prunifolium (known as blackhaw or black haw, blackhaw viburnum, sweet haw, and stag bush) is a species of Viburnum native to eastern North America, from Connecticut west to eastern Kansas, and south to Alabama and Texas.
Family Context
The Caprifoliaceae family is widely distributed. Notable medicinal members include:
- Japanese Honeysuckle — 31 documented uses
- Sambucus racemosa — 26 documented uses
- Simpson’s elderberry — 3 documented uses
- Viburnum cassinoides — 2 documented uses
Geographic Distribution
Black Haw has been recorded in 10 countries and territories worldwide, including Austria, Belgium, Canada, China, Germany, and others.
Traditional Uses
Black Haw has been traditionally used for respiratory conditions, urinary tract health, and nervous system disorders, among other applications.
Respiratory conditions.
- Asthma
Respiratory conditions are addressed through steam inhalation of the herb’s vapors or internal use as a warm tea. The hot infusion acts as an expectorant, helping to loosen phlegm and clear congestion. Some traditions combine it with honey for coughs.
Urinary tract health.
- Diuretic
Urinary tract applications typically involve drinking the herb as a mild tea, which increases urine production and helps flush the urinary system. It may be combined with other demulcent herbs to soothe irritated tissues.
Nervous system disorders.
- Nervine
- Sedative
- Spasm
Nervous system support involves taking the herb as a warm tea, often in the evening or before bed. The calming compounds interact with neurotransmitter systems to promote relaxation and restful sleep.
Active Compounds
Phytochemical research has identified 30 compounds in this species, including a diverse array of phytochemical classes (see the Complete Chemical Inventory below for the full list).
The identified compounds include the following categories:
- Flavonoid: antioxidant compounds that protect cells from oxidative damage
- Phenolic: antioxidant compounds that neutralize free radicals
- Sterol: cholesterol-like compounds with anti-inflammatory properties