I'm gonna guess coriander, but I'm not sure. It's supposed to be a belgian "single" - i.e. a smaller beer than a dubbel or tripel. I was pretty disappointed when that beer came out, replacing one lackluster beer (portsmouth lager) with another one, but it's not that bad. Overall I think Smuttynose is a great brewery, I lived in Portsmouth for a few years and I still think of those guys as my hometown beer, especially when the competition is redhook, which pretty much sucks across the board. I think the Shoals Pale Ale, IPA, and Robust Porter are as good as the particular style gets... don't get me started on the Hanami Ale, though, which is the other weak spot in the smuttynose line up and probably one of the worst beers I've ever tried.