From: ecoli.cix.compulink.co.uk (Peter Harris)
Fennel is the obvious one, the tinted variety is nice although I only have the ordinary. Really good fun is lovage, it can be huge. It is known in Germany as the "Maggi Herb" and is a constituent of that proprietory food enhancer. It has a pretty strong "dark" taste and was used to "extend" stews. I.e. it made a stew taste as thought there was more meat in it than there really was!
Latin names: Lovage = Levisticum officinale. Fennel = Foeniculum vulgare.
Some nice tall medicinal herbs: Angelica archangelica, if permitted to flower; Inula helenium, with nice yellow flowers; Valeriana officinalis, especially if it gets lots of nutrients; Verbascum thapsus and some other mulleins; some of the mallows; motherwort (Leonurus cardiaca), Russian tarragon (Artemisia dracunculus); and some of the Rudbeckia sp., like Rudbeckia laciniata. More? Sure, but I can't remember any offhand. Can you?