Garlic Mustard

Garlic Mustard is considered an invasive plant. It spreads quickly and takes over where other wild flowers would grow. This changes things more than you would think ...  I read that some where the White Butterfly that usually lays it's eggs on a certain native wild flower called Toothwort was forced to lay it's eggs on the Garlic Mustard because Toothwort was crowded out by Garlic Mustard, and this butterfly's eggs would not develop on the Garlic Mustard plant.
 This pretty flower is considered undesirable in our country but in Europe, where it originates, it is welcomed in the Spring as a beloved wildflower.  Its leaves are edible all year round and have a garlic flavor. The roots can be used the same way the Horseradish root is, and the seeds can be used to create at spicy condiment.

Where I found it: Along the side of the road