Garlic (Allium sativum)
The Egyptians placed it among their deities and none of their priests could eat it. It was a staple of Egypt and the pyramid builders went on strike when garlic was withheld from their diet. One legend was that when the Devil left the Garden of Eden that onions grew in his right footprint and garlic in his left. Pliny recommended it for 61 ailments and it was carried as a talisman in China, Japan and Greece.
Houseleek (Sempervium tectorum)
Also called 'hens and chickens'. Charlemagne ordered every householder to grow it on the roof against lightening and fire. It was grown in Rome in outside vases and was used for St. Anthony's fire, gout, ulcers and burns. It will grow in the poorest soil if it is well-drained.
Lavender (Lavandula vera)
Romans used it to perfume baths. It was used to avert the evil eye, but it was also dedicated to Hecate, goddess of witches. Lavender water is the oldest English perfume and the plant itself was burned in hospitals for incense.