This was in my yard when I bought my house, anyone know what it is?

ftp://ftp.diy-efi.org/uploads/sgr/126_26131.jpg
ftp://ftp.diy-efi.org/uploads/sgr/126_26141.jpg

These are growing down along the hike and bike trail. What are they,
and do they flower?

ftp://ftp.diy-efi.org/uploads/sgr/123_24001.jpg

Thanks!

--steve