Brackets

My wife loves flowers. We are running out of windowsills on which to place them. I purchased a piece of lumber and used some of my woodworking clamps to hold it to the existing windowsill. However, I would like to have my clamps back, so I started making some brackets. The rose is brazed to the stem and the tulip is screwed to the stem, where the stigma acts as the nut and the stem as the bolt.