Why do Agaricus Bisporus Mushrooms have Gills?
Answers
The common mushroom could be confused with young specimens of the deadly poisonous destroying angel (Amanita sp.), but the latter may be distinguished by their volva or cup at the base of the mushroom and pure white gills (as opposed to pinkish or brown of A. bisporus). Thus it is always important to clear away debris and examine the base of such similar mushrooms, as well as cutting open young specimens to check the gills. Furthermore, the destroying angel grows in mossy woods and lives symbiotically with spruce.
A more common and less dangerous mistake is to confuse A. bisporus with Agaricus xanthodermus, an inedible mushroom found worldwide in grassy areas. A. xanthodermus has an odor reminiscent of phenol; its flesh turns yellow when bruised. This fungus causes nausea and vomiting in some people.
The poisonous European species Entoloma sinuatum has a passing resemblance as well, but has yellowish gills, turning pink, and it lacks a ring.
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