henbane

This term refers specifically to a toxic plant known for its hallucinogenic and sedative properties. In historical and literary contexts, it is frequently associated with the "flying ointments" of witchcraft and ancient pharmacology, carrying a dark, occult connotation rather than a modern botanical one.

As a botanical species name used in a general sense, it typically functions as an uncountable noun when referring to the plant as a substance or material. While it can be counted when referring to individual plants, it is most commonly treated as a mass noun in medical or historical descriptions.