Here are a few plants in my backyard. The first one is actually a shrub, the second one must be an annual, and the last one is a vine. They were all right next to each other. This is in northern Wisconsin, in a drier area, with very sandy soil.
#1 is a hickory Carya seedling; from its multiple stems, I'd guess it started a few years ago and got cut to ground level one or more times (by any of mower, weedeater, deer, etc.) and resprouted.
i'm actually not going to be there for a while so i will not be able to post pictures of the flowers. the leaves on the vine look distinct though.