That's what I thought it was...wild radish.
I'm no expert by any means, but a LONG time ago, when I walked to elementary school in SoCal, we'd cut across a small field that had a little diagonal path through the wild mustard and radishes. Of couse that lot is now a mini mall...
Edited 1 time(s). Last edit at 02/26/2011 10:07AM by hikerchick395.