Users smoking the plant have experienced different effects. The cannabinoid is not THC, the main psychoactive chemical in cannabis, but it is of similar molecular structure. The liverwort contains perrottetinene and perrottetinenic acid. The quantity of cannabinoid present is much less than in cannabis.
Radula marginata has a long history of traditional use as a rongoā (Māori herbal medicine), and is a taonga of the Māori people of New Zealand, so any attempt to prohibit its use would be a breach of the Treaty of Waitangi .
- Toyota, M., et al. (2002). New bibenzyl cannabinoid from the New Zealand liverwort Radula marginata. Chem Pharm Bull (Tokyo). 50(10) 1390.
- NZ's Drug History...From Zero. Stuff.co.nz, republished from Radio New Zealand, 7 November 2016
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