Comment: Whoever introduced that vile bird vetch into Alaska should be hung, drawn and quartered!  Talk about invasive!  I don't think I have seen any more ecologically damaging plant in Alaska to match it, including dandelions.  At least most invasive plant species in Alaska seem to stick to disturbed soil such as roadsides and lawns, but not this nasty plant --- I have been seeing vast swathes of it in relatively open woodlands as well, particularly in and around the area near the Palmer Agricultural Experimental Station on Trunk Road where it was presumably first introduced.  I've seen it climbing up and pulling down wild rose and mooseberry plants, and I shudder to think what our woods and roadsides are going to look like in another ten or twenty years if this bird vetch cannot be controlled (which it almost certainly cannot be at this point).