Wildflowers: Please help identify

Hello, I live on about 4 acres in Selkirk, Ontario, near Lake Erie.
I had cut this 2 acres right down to about 2 inches before spring, and as you can see from the photos it all grew back quite fast. Anyways one flower out of the entire 4 acres has caught my attention. Its the only one I can find around here, and I would like to find out if it is rare, how to take care of it, or if it will seed itself etc....
To me it looks like an orchid, but I am no expert.
See the pics and let me know :D

 

A Lathyrus of some sort. Here's a key that will help... I am thinking Lathyrus latifolius.

 

Thanks, that looks just like it!
Now all I have to do is read up to find out how to get more of these beautiful flowers to grow.
Thanks