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The order _Solanaceæ_ is perhaps the most interesting, for it includes such dangerous poisons as Tobacco, Datura, _Atropa belladonna_ (Deadly Nightshade), Henbane, Bittersweet (_Solanum dulcamara_), Common Nightshade (_Solanum nigrum_), and a very great many important drugs. Even the common potato contains a poisonous secretion _solanin_, and it is dangerous to eat green potatoes or the foliage. Yet the Tomato or Love Apple (so called because it was supposed to excite tender feelings) is both nutritious and delicious. Chillies and Cayenne Pepper (_Capsicum spp._) are also commonly used as condiments.