Originally Posted by menschmaschine
I can second the Willamette. (But they might be similar to Fuggles?) I brewed an oatmeal stout with them once that had excellent hop flavor. I was surprised at how "Britishy" they were.
Willamette is a Fuggles cultivar. It was developed by the Oregon Agricultural Experimental Station in the mid-1970s, from a domestic dwarf variety and Fuggles. The main differences are three, one theoretical and two practical. First, Willamette is a triploid, while Fuggles is tetraploid. Second, Willamette is seedless while Fuggles is not (no seeds = no weight as seeds = more AAs in the wort). Third, Willamette is much more disease-resistant than Fuggles.
Flavor and aroma are very similar to Fuggles, being spicy, grassy and herbal, at the same time being very mild and floral. Most brewers can't tell Fuggles and Willamette apart. That makes W a very good sub for F.