Large Russian Vetch

With the intent of learning more about Hairy Vetch, which I know by the latin name of Vicia villosa, in order to plant and care for it skillfully, I went to the venerable site of Plants for a Future.

I always thought that when I had the Latin name, that all people talking about that Latin name would be talking about the same plant, and I have come to trust Plants for a Future.

SO I was amazed to find that Plants for a Future thinks that Vicia villosa refers to Large Russian Vetch, which sounds remarkable, a perenial nitrogen fixer whose leaves and seeds we can eat, which is a climber that grows to 6 feet, and which grows in any kind of soil of any pH, in sun or part shade?

So why is there this confusion?

And why have I not heard of this wonder plant before?

And where can I get some seeds?

Thank you.

I thought I had found a seed source, but was wrong.