These are Sanservieria hycinthoides, also known as Snake Plants, or Mother's Tongue, or African Bow String Plants. Today in my quest to rid my property of exotic invasive plants I pulled out 123 of these African Bow Plants. Some broke off and may regrow, but you can see in the bottom picture I got most roots and all.
Update 3/13/2012
Just a few of these Snake Plants have come up around my house. But I'll be pulling them out and burning them soon.
