I've found dozens of great specimens over the last few years by using Google Maps. Find your hometown on the map and zoom out until you can see 20 miles in all directions. Find some back country roads through a wooded area. Zoom back down and go down into "street view images". Then, just "drive" along, zooming in on the shoulders and roadside ditches until you find some promising spots. NOW....... I'm not saying this is entirely legal, so check your local laws , follow your conscience and use some common sense. My feeling is.... if the road crews are fighting to cut down brush along the highways, I'm kinda helping them a bit.