What kind of substrate is it growing on? The Polypodiums (including licorice fern, Polypodium glycyrhiza) are generally on rock or epiphytic on trees. Could you describe the leaves? The Polypodiums are also quite distinctive in this regard; when it comes to the NW US, Woodwardia fimbriata is the only other fern I'm aware of with pinnatifid (the leaflets aren't truly distinct, all being connected at the base; see link) leaves.

Patrick Alexander

Here is a link that might be useful: {{gwi:601302}}

Thanks Patrick, They are growing on a steep hill, rocky, old heavy clay soil that never gets supplimental water (not to mention fertilizer or amendments), yet they seem to slowly multiply every year. They are on a patch of hill that I have ignored for the last 5 years (too distant and steep to water or mow), and they are nestled in among Scotch Broom, crab grass and blackberries that are over running the place. Each stem seems from the top to be its own plant - One stalk that divides mid way up, with 3-5 "branches", and each of those has a very broad triangle of fern-looking, feathery leaves. Could this be a NON fern in disguise? I'm still completely puzzled. Went up there today though and there are several around 3' high.
-E ;>

Ha! I found it! Its a Bracken Fern. After much digging, the internet comes through! Here's the link I found with general info and photos... Thanks again Patrick for your help!
-Erika

Here is a link that might be useful: Bracken Fern

Habitat sounds right for licorice fern, but the description of leaves sure doesn't. Sounds like bracken, Pteridium aquilinum. See the link. If that's what it is, each stalk is a single leaf. If that's not what it is... I'd guess something else that's looking ferny, as I can't think of any ferns other than bracken that'd fit the description.

Patrick Alexander

Here is a link that might be useful: Wisconsin University Herbarium: Pteridium aquilinum

LOL! Looks like you beat me to it by a minute or so.

Patrick Alexander