Snot Apple (Thespesia garckeana) — Uxakuxaku

Thespesia garckeana is a small to medium-sized deciduous tree in the mallow family — related, surprisingly, to hibiscus and cotton — growing five to fifteen metres tall in open miombo woodland, on rocky hillsides, and along the dry margins of river-fringe forest. The leaves are broad and leathery, heart-shaped, and covered with fine stellate hairs. The flowers are pale yellow with a dark purple centre — characteristic of the Thespesia genus — and they are replaced by round, hard-shelled fruit that ripen from green to yellowish-brown, revealing inside a thick, sticky, mucilaginous pulp surrounding the seeds. It is this pulp that gives the tree its common name, and that also gives the fruit its medicinal character as a demulcent — a substance that coats and soothes irritated mucous membranes.

The bark is the most widely used medicinal part for skin and wound conditions. A decoction of the inner bark or root bark — pieces simmered slowly in water for twenty to thirty minutes — is used across Zimbabwe, Zambia, and Mozambique as a wash for infected wounds, chronic skin sores, and fungal infections. The bark is rich in tannins, flavonoids, and phenolic compounds with demonstrated antibacterial and antifungal activity in several laboratory studies. Traditional healers prepare a cooled bark tea and apply it directly to the wound with a clean cloth, or soak a compress in the warm decoction and bind it to slow-healing sores. The astringent tannins dry the wound surface, reduce bacterial load, and create an environment that supports clean, unimpeded healing.

The root bark has a well-established use across southern Africa for sexually transmitted infections and urinary tract complaints. A decoction taken internally in small, measured doses is prescribed by traditional healers in Zimbabwe for gonorrhoea, vaginal infections, and the painful, burning urination that accompanies urinary tract infection. The antibacterial compounds in the root bark create an inhospitable environment for the organisms most commonly associated with these conditions. Healers always caution about dose — the root is more potent than the stem bark, and a modest, measured quantity is used for a short course only, never as an open-ended treatment. This is a medicine for supervised, purposeful use.

The fruit pulp — the sticky, mucilaginous flesh that gives uxakuxaku its name — is a demulcent medicine of real value for the throat, chest, and gut. Eaten or prepared as a thick infusion, the mucilaginous compounds in the fruit coat the mucous membranes of the throat and airways, reducing irritation, soothing a dry and persistent cough, and providing gentle relief for the raw, inflamed feeling of a chest cold that has lingered too long. Traditional healers in parts of Zambia and Zimbabwe prescribe the fruit pulp for constipation — its thick, slippery texture lubricates the gut and promotes gentle movement without the harsh purgative action of stronger medicines. The pulp is also used as a topical emollient for dry, cracked skin, applied directly to rough patches and left to absorb.

The leaves are used externally for wounds, ulcers, and inflammatory skin conditions. Crushed fresh leaves applied as a warm poultice to infected wounds and skin sores draw out infection and reduce the swelling in surrounding tissue. A cooled leaf decoction is used as a wash for fungal skin conditions and slow-healing abrasions. Several ethnobotanical studies have recorded the use of Thespesia garckeana leaf preparations across the miombo zone for eye complaints — a cooled, carefully strained leaf decoction applied with a clean cloth to the closed eyelid for conjunctivitis and inflamed, irritated eyes — a practice shared with several other tannin-rich tree medicines in the southern African tradition. The leaves are also used in steam inhalation for nasal congestion and sinus pressure, where the aromatic volatile compounds assist in opening blocked airways.