Here we have tickseed sunflowers in a fen. This spot seems to be extreme fen. The soil and water must be very basic. Instead of head high plants we get knee highs. When I saw these, they struck me as good examples of individual variation. We so often wonder if nature or nurture account for variation. This time it is clear that nurture makes a the big difference. For these plants, being short may be an advantage. What kind of a critter could gather these tickseeds? Almost anything bigger than a mouse.