NOt sure where you are, but most Wisteria grown in the UK is strongly scented! This is the lilac flowered variety - grow more than two or three stems of it and it could pull your house down it's so woody. You get some unusual varieties though and there is one in a front garden near my house that has indeed been trained into a tree! A White flowered, non-scented one - this year is the first time it has flowered.
Now there's a kind of Eastern balm or sage that could also be a good candidate for Athelas....but I can't locate the name yet....
EDIT - Found! What I was thinking of was
Tulasi or Holy Basil, as used in the Ayurvedic tradition of medicine. Not sure about the leaf shapes but the traditions make it sound appropriate.