21. "' Satyrion "'is also a name for ragwort and ancient aphrodisiac made from it. 22. The Scots sometimes refer to the noxious ragwort , as " Stinking Billy " in memory of the infamous Duke. 23. Without doubt the most common of those species that are totally reliant on ragwort for their survival is the cinnabar moth. 24. While the landscape has very few trees, the fertile soil supports a wide variety of wild flowers including Patagonian ragwort . 25. Females can lay up to 300 eggs, usually in batches of 30 or 60 on the underside of ragwort leaves. 26. The same applies to New Zealand, where farmers sometimes bring in helicopters to spray their farms if the ragwort is too widespread. 27. Besides the fact that ragwort is very attractive to such a vast array of insects, some of these are very rare indeed. 28. The ragwort was their transport and every one of them picked a plant, sat astride and arrived in Ireland in an instant. 29. In New Zealand the larvae have been observed feeding on the naturalised weed, ragwort ( " Jacobaea vulgaris " ). 30. Oddie explains how Oxford ragwort has made its way to a wall in Liverpool from Mount Etna ( via the Oxford Botanical Gardens ).