Portobello mushroom, Agaricus bisporus is an edible basidiomycete mushroom native to grasslands in Europe and North America.
It has two color states while immature—white and brown—both of which have various names.
The pileus or cap of the original wild species is a pale grey-brown in color, with broad, flat scales.
on a paler background and fading toward the margins. It is first hemispherical in shape before flattening.
out with maturity, and 5–10 centimetres (2–4 inches) in diameter.
The narrow, crowded gills are free and initially, pink, then red-brown and finally a dark brown with a whitish edge from the cheilocystidia. The cylindrical stipe is up to 6 cm (2 1⁄3 in) tall by 1–2 cm wide and bears a thick and narrow ring, which may be streaked on the upper side. The firm flesh is white, although stains a pale pinkish-red on bruising. The spore print is dark brown.
where to buy Portobello mushroom
This mushroom is commonly found worldwide in fields and grassy areas following rain, from late spring through to autumn, especially in association with manure. In many parts of the world it is widely collected and eaten; however, resemblance to deadly or poisonous lookalikes (see below) should be noted.
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.