There are a few things to point out in this picture, first thing, depth of field, this picture makes the mushroom the main focus, whilst the background is blurred. Also, we can see the texture inside of the mushroom. I like this picture the most it is zoomed in, and the texture is smooth.
poppy seed heads - these are pretty sturdy when dry (unlike many dried flowers), have tall, straight stems, and they hold color for quite a while. i'd put a vaseful somewhere that keeps the tops below eye level.