mystery plant morning glory?

[hgunder]

I have a volunteer plant in my vegetable garden this year. It is a hairy vine that winds around whatever it can reach, has flowers just like a morning glory (same shape, color, behavior), but it's leaves are totally different from any morning glory I've ever seen. The leaves are not single heart shapes, instead each leaf resembles a trident with each of the three points shaped kind of like a fancy spade. Sorry I don't have a picture of it. It has lots of big round seed pods where each flower was (like a morning glory makes but much bigger). I just want to know what it is and if this plant is worth saving the seeds for next year or should be ripped up with the rest of the vegetable garden. Thanks for your help.

[opabinia51]

If the vine is hairy, it won't be morning glory. I'm thinking that it might be larch pea. (You are lucky because morning glory is incredibly invasive, at least it is around here)