Garlic mustard is an invasive species from Europe. It’s similar to dandelions in that it was first brought over as a culinary herb but then later became a problem. Although it’s not as widespread as dandelion, because the seeds aren’t carried by the wind, they just fall around the parent plant, it’s a worse plant because it can excrete a garlic smelling substance in its roots which can be toxic to other plants.
Contrary to what Becca told me, it’s not poisonous to people. And it’s actually quite tasty. It has a very mild lettucy quality, with just a hint of garlic.
Here is a picture from my backyard of a half albino garlic mustard. It kind of reminds me of that crazy half albino lobster.