We're a little short on information about the "boundary marker" of which you speak. Absent other information or local rules a lone white stake might not indicate anything. That aside, all that matters is where the ball ends up. A ball hit from a teeing ground can pass over any number of hazards and course boundaries on the way to its final resting place. A ball that, in this case, ends up on the putting green is in play.
10/23/14 at 10:30pm