Yes, typo (oopsie). So how can I tell which one to use? If I just somehow guess, I'll go with A. aleuticum as that sounds more PNW-ish to me...and seems to be the preferred name from the Burke Museum, although their information is confusing as well. They list A. aleuticum as the accepted name, A. pedatum (and others) and synonyms, but then list A. pedatum as 'Treated in the Flora of the PNW as' - whatever the heck that might mean.
My field book, Plants of the Pacific NW Coast, lists it as A. pedatum with the notation it is also known as A. aleuticum. I have found this field guide to not always be accurate, though, so usually look for a secondary source when there is a conflict. It was first printed in 1994 and most recently in 2004, not sure if it was updated at that printing or not. Maybe I need to get a more up to date field guide.
