I have to go back and try this one again. I was trying to get everything from front to back in focus, but missed a bit in the front. The thistles aren't sharp enough. Another go tomorrow morning; hopefully there will still be thistles. (7/20 - here's the new, improved version http://www.pbase.com/ed_k/image/63831465 )
Here's a closeup of the same two thistles - http://www.pbase.com/ed_k/image/63778005