sheeba moroccan tea

I do appritiate your discussion, because I am searching this mysterious plant for years too. In Rabat, Morocco, they added little of sheeba lieves along with a pinch of regular tea preparing a fresh mint tea "the à la mente". The taste was very special, I asked what was that fresh fragrant silvery herb which gave the tea that unique delicate fragrant taste. I knew, that some people grew it in their gardens, but I could not get more information that a name sheeba. I am an advanced herbalist and I thought also that sheeba leaves are very similar to wormwood, which has so many different species around the world. Yesterday, passing by a little moroccan grocery in Ottawa (Ontario, Canada), I asked the owner if he new the sheeba...he did and sent me to one moroccan store in Montreal (Quebec, Canada), where they are selling sheeba. I have another hope to learn more about this mysterious herb. In Morocco, they warned me to use only a small amount of fresh sheeba leaves, but I did not understand why. I thought that perhaps it was abortifaciens or something like that, because nobody would tell me more about it. If sheeba contains thujone, it would be toxic in higher amount. Other species of wormwood, for example the chinese one (Artemisia annua) does not contain thujone as absintia, there are some different uses among species, also most of them are similar, and it is used also as an efective antimalarial. There are differences among wormwoods so perhaps the moroccan one would be like a new star on the herbalist sky. Good luck and progress in our search!
Beatrice.