What is this bizarre plant?

While walking we saw this plant. I barely touched it and it exploded seeds over two feet into the air


I don’t know but I hate it. I tried to get them all out of our flower beds but the few survivors are reseeding themselves explosively. 


I was weeding my garden yesterday and came upon these plants. What a surprise to get that barrage of seeds in my face.Gave up on the weeding. Have to think of a way to get rid of them. Maybe pouring white vinegar would work?


Bittercress, I think. Awful scourge! Marvelously adapted for propagating itself massively.


Thanks,mim. Sounds like it. Bittercress is not easy to eradicate.



Green remedy:  Boiling water



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