If you're lucky, the flower pot parasol will emerge from the soil of a potted plant that you buy from a florist. You'll undoubtedly prefer the mushroom to your potted plant, and you'll be tempted to weed out your plant and encourage bigger and better fruitings of the flower pot parasol. We don't encourage this, as your house plant will probably outlast the mushroom and usually the mushroom and the plant look nice together.
The existence of the flower pot parasol raises this question: Why don't florists make a point to sell mushrooms in pots. Ask them about it and maybe they will one day. For now, we have to buy mushroom-growing kits by mail order.
DISCLAIMER: Do not eat any mushroom based solely on the content of this website, which is for informational purposes only. You are responsible for making sure you are 100% positive of a mushroom’s identity before consuming it. You must make sure of this yourself.