I am working in a flower garden and this plant seems to be prolific. The roots are very hearty and almost like tubers. I don't recall ever seeing it and I'm thinking it is just an aggressive weed.
View full size in a new window
The plant in your photo looks like a groundcover, cranesbill geranium, Geranium sanguineum. mh
Replied April 27, 2016, 11:59 AM EDT