In fact, Physicians of today still use an extract of it for the same purpose. LSD was first isolated from this nasty black fungus which can be found at times on grain crops. The Aboriginal peoples of Australia traditionally used the leaves as a fever remedy, and in poultice form to treat wounds. It has antiseptic and stimulant qualities. A useful expectorant for bronchitis.
Russian research suggests that it can kill some flu viruses.
A gargle for this purpose can be made of 6 drops oil to a glass of warm water. Do not swallow. The oil can be used in a vapouriser to inhale for chest colds and bronchitis. The oil or fresh leaves are used in some healing rituals. A Blue candle anointed with the oil, and then burned, is used to increase healing vibrations.