An Advisor in my office was starting some plants in potting mix.  We were surprised to find the plant (see photo; for reference the pots about 4" wide and tall) come up from what assume is the potting mix but could be a seed contaminant.  I've looked through a number of  references and can't ID it.  It is heavily covered with spines like bristly oxtongue but it is not that weed. The spines/bristles are on both sides of the leaves, including the midrib.  Also on the stems and petioles.  The upper side of the leaves are stippled with dots  that are brownish.  I am currently growing it until it flowers.  That should make it easier to ID.

Any ideas are welcome!