Immediately after it fades, the veil leaves a ring zone around the stem (often known as a “paranematal line”). Some mushrooms have an additional prolonged stem, plus the location near where it attaches to your cap is commonly darker. I found a field where they were growing within the thousands.... https://mushroom-spores-uk41425.ssnblog.com/23312465/the-magic-mushroom-scotland-diaries