i think this is a nice looking plant but i've been fooled before. the purple blooms are very intricate and seem almost orchid like. is this a bad weed?





just to add:) the flower does smell like a violet.

Viola odorata/Sweet Violet maybe? Definitely a Violet of some kind.

I agree, looks like a Viola of some type; possibly Marsh Violet (Viola adunca) which is found in Oregon but there may be others as well:
http://www.nwplants.com/busine...
http://www.oregonhikers.org/fi...