Hyoscyamus niger
The name henbane dates from AD 1265, when the word bane meant thing that causes death. Other etymologies derive from the Indo-European stem bhelena meaning crazy plant. The Proto-Germanic element bil refers to vision, hallucination, magical power, and miraculous ability. This poisonous plant belongs to tribe Hyoscyameae of the nightshade family Solanaceae. It is native to temperate Europe and Siberia. Henbane naturalized in Great Britain and Ireland during historical periods. The scientific name Hyoscyamus niger identifies black henbane or stinking nightshade. Ancient writers used these terms to describe a substance with dangerous properties.
Pliny documented the use of henbane by ancient Romans as being of the nature of wine and therefore offensive to the understanding. Dioscorides recommended it as a sedative and analgesic for pain relief. John Gerard's Herball states that leaves, seeds, and juice cause an unquiet sleep like unto the sleep of drunkenness. This state continueth long and is deadly to the patient. Washing feet in a decoction of Henbane caused sleep. Often smelling of the flowers also causeth sleep. The plant was used in combination with mandrake, deadly nightshade, and datura as an anaesthetic potion. These mixtures produced psychoactive properties including visual hallucinations and a sensation of flight. Schultes & Smith 1976 recorded these findings on page 22. The plant originally spread from continental Europe, Asia, and the Arab world to England in the Middle Ages.
Albertus Magnus reported in his work from 1250 that necromancers used henbane to invoke souls of the dead and demons. Witches drank the decoction of henbane and had dreams for which they were tortured and executed. It was used for witches' ointments and making weather or conjuring spirits. If there were a great drought then a stalk of henbane would be dipped into a spring. Sun-baked sand would be sprinkled with this mixture according to Perger 1864, page 181. During a Pomeranian witchcraft trial in 1538, a suspected witch confessed she gave a man henbane seeds so he would run around crazy and sexually aroused. An Inquisition file noted a witch admitted having once strewn henbane seeds between two lovers. She uttered the formula Here I sow wild seed, and the devil advised that they would hate and avoid each other until these seeds had been separated. Marzell 1922 records this account on page 169. Henbane became inseparably associated with witchcraft and malefic practices by the Late Middle Ages.
Henbane was discovered among imported spices during an underwater archaeological excavation of the royal Danish-Norwegian flagship. The ship sank in 1495 near Ronneby, Sweden. The purpose of this henbane is not known but could have been medicinal for soothing toothache. It might also have served as an anti-emetic or to prevent motion sickness. Henbane seeds have been found in a Viking grave near Fyrkat, Denmark. This site was first described in 1977. Analysis of symptoms caused by intoxication suggests it may have been used by berserkers to induce rage states used in war. These archaeological finds show that Hyoscyamus niger was known to the Vikings. The plant traveled through the company of Romani people across regions.
Henbane originated in Eurasia and is now globally distributed as a plant grown mainly for pharmaceutical purposes. Its cultivation for medicinal use is widespread and legal in central and eastern Europe and in India. Seeds from north-west Himalaya exhibit dormancy and germination can be induced by gibberellic acid, nitrates, sodium nitroprusside, and moist cold stratification. Sharma S and Sharma RK published findings on long-term storage-dependent changes in seed physiological aspects in 2010. Sharma RK observed in 2024 that fully matured seeds exhibited dormancy while comparatively immature seeds germinated well. These latter seeds can be manipulated for propagation without pre-treatments. Henbane material in most Western countries can be bought in pharmacies with a prescription only. Sales of henbane oil are not legally regulated and allowed in shops other than pharmacies in the US. It is rare in northern Europe but cultivated elsewhere.
Hyoscyamine, scopolamine, and other tropane alkaloids have been found in foliage and seeds of the plant. Standard alkaloid content ranges from 0.03% to 0.28%. These alkaloids exert an anticholinergic mechanism which blocks acetylcholine function in the brain. This antagonizes muscarinic receptors resulting in altered consciousness, hallucinogenic experiences, and delirium. Common effects include hallucinations, dilated pupils, narcosis, restlessness, and flushed skin. Less common effects involve tachycardia, convulsions, vomiting, hypertension, hyperpyrexia, and ataxia. Initial effects typically last three to four hours while aftereffects may last up to three days. Side effects include dryness in mouth, confusion, visual illusions, bizarre thoughts, locomotor disturbances, memory issues, and farsightedness. Overdoses result in severe anticholinergic syndrome, coma, respiratory paralysis, and death. Pigs are immune to henbane toxicity and enjoy its effects. Larvae of cabbage moths eat henbane leaves despite general toxicity to cattle, wild animals, fish, and birds.
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Common questions
What is the origin of the name henbane and when did it first appear in records?
The name henbane dates from AD 1265, when the word bane meant thing that causes death. Other etymologies derive from the Indo-European stem bhelena meaning crazy plant.
How was Hyoscyamus niger used by ancient Romans and medieval practitioners for medical purposes?
Pliny documented the use of henbane by ancient Romans as being of the nature of wine and therefore offensive to the understanding. Dioscorides recommended it as a sedative and analgesic for pain relief while John Gerard's Herball states that leaves, seeds, and juice cause an unquiet sleep like unto the sleep of drunkenness.
When did Henbane become associated with witchcraft and what specific historical trials involved its use?
Henbane became inseparably associated with witchcraft and malefic practices by the Late Middle Ages. During a Pomeranian witchcraft trial in 1538, a suspected witch confessed she gave a man henbane seeds so he would run around crazy and sexually aroused.
Where were archaeological finds of Hyoscyamus niger discovered and what do they suggest about Viking usage?
Henbane was discovered among imported spices during an underwater archaeological excavation of the royal Danish-Norwegian flagship which sank in 1495 near Ronneby, Sweden. Henbane seeds have been found in a Viking grave near Fyrkat, Denmark, suggesting it may have been used by berserkers to induce rage states used in war.
What are the chemical components of Hyoscyamus niger and how do they affect human consciousness?
Hyoscyamine, scopolamine, and other tropane alkaloids have been found in foliage and seeds of the plant. These alkaloids exert an anticholinergic mechanism which blocks acetylcholine function in the brain resulting in altered consciousness, hallucinogenic experiences, and delirium.