Anisodus tanguticus

Anisodus tanguticus (ཐང་ཕྲོམ་ནག་པོ། in Tibetan) is a species of flowering plant belonging to tribe Hyoscyameae of subfamily Solanoideae of the nightshade family Solanaceae.

[4][5] Anisodus tanguticus is more commonly known in China as 山莨菪 (shān làngdàng = 'mountain henbane') or Zang Qie (transliterated also Tsang-ch'ieh).

Anisodus tanguticus is found growing (on grassy sunny slopes) principally on the Tibetan Plateau, its range extending from the Hengduan Mountains of Sichuan and Yunnan in the east, through Qinghai and Gansu to the northwest, Tibet in the west,[7] and Nepal in the south.

[10] Due to its distribution on the Tibetan Plateau, which includes many mountains and valleys, A. tanguticus can be found in very isolated areas relative to another patch of the same plant.

It is frequently found growing in the vicinity of settlements and monasteries, thriving as it does in soils nutrient-rich through the regular depositing of horse and cattle dung.

It contains high levels of the tropane alkaloids hyoscyamine and scopolamine, which affect primarily the parasympathetic nervous system and can act as anticholinergic agents.

[12] Anisodamine has also been found to be highly beneficial in cases of noise-induced hearing loss, dilating the capillaries and improving microcirculation in the bony labyrinth; while Anisodine has been used clinically for migraine and diseases of the fundus occuli due to vasospasm.

A study was conducted in an effort to find the most effective method of breaking seed dormancy in the species in order to increase rates of germination.

The mechanical scarification method (which involves the breaking, scratching, or softening of the seed coat) was found to be the only way to increase germination.

Anisodus tanguticus
Distribution of A. tanguticus
Anisodamine_chemical_structure alt text
Anisodamine chemical structure
Anisodine alt text
Anisodine chemical structure