Lathyrus latifolia

could be yours survived, some are perennial

http://macgardens.org/?p=385

I went through a "wildflower" phase here, and planted some wild sweet peas. And they are trailing all over everything years later, even with all my efforts to get rid of it. The one thing to remember about wildflowers is that they are often very persistent. And don't ask me about the Butter and Eggs.

One of my favorite wild flowers from my childhood.
Also loved blue-eyed grass.

and I have tried to transplant some of it in my yard. It just will not take in my flower beds, or my yard, or the border between the two properties. Go figure.

Butter and eggs certainly does take over in the flower beds though. But it at least is a pretty flower and the plant is not huge. Not like that sweet pea!!! It creeps on everything.

My childhood favorites were Buttercups, and I did get some of them to grow for me, but they are not invasive.

grew lovely vines, they never actually flowered. Not even sure if my weed is goats rue or devil's whatever, but it is definitely a weed b/c it showed up all over the place this year.

It is non-fragrant, like the one you linked, but the flowers are really TINY. I only assumed the pea-family thing b/c a) it had pea-like tendrils when it was in the growth stage and b) it's now making pea'ish pods. I then Googled and got the goats rue/devils shoestring idea, but the pictures still don't QUITE match my weed.

Of course, I got a free tomato b/c of my laissez-faire weed-gardening attitude, so apathy was its own reward in this case.

also known in my yard as "gdmfrickingsombtch" I didn't recognize at first, cause here in Oregon they're very purple (and white).
I wait till it flowers, then yank em up before they set seed.

how many places it popped up this year. Will be sure to rip it up before those pods burst!