In his book ” Healing with plants pour les dummies ”(First ed.), Dr Franck Gigon publishes a non-exhaustive but nonetheless very complete list of around a hundred problematic plants, some of which are prohibited, others used only by experienced phytotherapists. They present a potential danger for various reasons:
Confusion: aconite root resembles that of turnip or parsnip …
Using the wrong part of the plant: ginkgo fruit instead of its leaves, aloe juice instead of its pulp …
Excessive consumption becoming toxic: 5 to 10 g of nutmeg can cause a narcotic state, more than 20 g very serious side effects.
Ingestion of a plant for strictly external use: arnica …