You might try carphephorus odoratissimus as well. Very difficult to grow, but you can probably find a mail order supply.I am a member of a nz distilling forum, some of us are experimenting with Hierochloe redolens as a substitute for Hierochloe odorata for making Zubrowka. In my reading I discovered the use of it as a flavoring for tobacco....
I was querying safe usage, mixing ratios etc
I did find this useful thread That mostly answered my questions http://fairtradetobacco.com/threads/5454-Deer-Tongue-Tonka-Beans-Safety-and-Use?highlight=odorata
I am intrigued by this plant now.