This came out differently from what I had imagined. I upped the contrast a little to show the detail on the teasel. I like the way the bokeh is more defined. I will be interested in your comments - should I have left it colour?
Surprisingly, I'm going to go with the b&w one. In the colour one, my eyes are drawn to the yellow flower, but the b&w really shows up the teasel as the star of the show. Very nice!