Found this in a local park. I believe it is garlic mustard. It does not have a square stem and has a long white tap root (I broke the bottom portion off). Could it be henbit deadnettle or blue/yellow violet?
Matt, I know this thread is solved, but my curiosity got the better of me so I did some googling and found photos that look like your garlic mustard on this site: http://www.yougrowgirl.com/2009/04/16/. Now that you know it's garlic mustard, see how much you can yank out of your local park! It's a terrible "alien invasive" that, alas, deer won't eat, and it prevents stuff they will eat from growing. Susan
When I read the original upload and the associated message, I was to write why not Garlic mustard?, Alliaria petiolata, very common in area of my research in Kashmir. Thanks it was so as confirmed ultimately.
Thanks for finding those pictures. I was worried when I couldn't find pictures or info that matched what I saw. I guess it is considered a "1st year plant" since it isn't growing upright yet. I will definitely get rid of some of it now.
Matt, you could notify Arlington County that you found the garlic mustard if you found it in a county park, and they might send volunteers to help eradicate it - see [HYPERLINK@www.arlingtonva.us] Fairfax County Park Authority has a website for use in reporting alien invasive plants; perhaps the Arlington County site has a similar link.