African wormwood — the most widely used medicinal plant in southern Africa. Steam inhalation for respiratory infections, tea for immune support, the ancestral cold-and-flu remedy of southern Africa.
For South African diaspora (significant communities in UK, US, Australia), umhlonyane is the home remedy that crosses with them. The mothers who pack dried umhlonyane when they visit their children in London or New York are carrying the pharmacopoeia.
African wormwood's essential oil (alpha-thujone, camphor, 1,8-cineole) has documented broad-spectrum antimicrobial activity against respiratory pathogens including Streptococcus pneumoniae and Haemophilus influenzae. The cineole component is a proven mucolytic and bronchodilator (the same compound in eucalyptus used in Vicks VapoRub). Steam inhalation delivers these compounds directly to the respiratory mucosa — the traditional use is pharmacologically validated. In vitro antiviral activity against influenza A has been demonstrated. The anti-inflammatory sesquiterpene lactones inhibit NF-kB activation — a master inflammatory switch.
Tea: steep 1 tbsp fresh or dried leaves in boiling water 10 min; drink 1-2 cups for cold/flu. Steam inhalation: add handful of leaves to boiling water; lean over pot with towel over head; inhale steam for 10-15 min. Available at South African grocery stores and herbal medicine suppliers online.
Free, no account needed to ask.