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Agaricus placomyces

Agaricus placomyces

Description:

Agaricus placomyces has a cap that is 5–12 cm and varies from convex to broadly convex or nearly flat in age. In addition, the surface of the cap is dry and covered with brownish fibers and scales, especially over the center. Underneath, the cap can be whitish under normal environments, or pinkish in wet weather. Covered with fine, appressed greyish-brown scales and concentrated at the disc, the cap is thick, slowly becoming vinaceous when injured; the odor strongly smells phenol. It yellows in KOH.[1] The gills of this mushroom are free from the stem, crowded, and pale grayish-pink, turning brown in age. In addition, the stem is 6–15 cm long, 1–1.5 cm. thick and more or less equal, with an enlarged base (unlike typically ending in a small bulb like Agaricus pocillator). Also, it is fairly smooth, white and bruising yellow, especially at the base, with a persistent ring, and the partial veil when still covering the gills developing brownish to yellowish droplets.[2][3] At 8–15 cm long and 2–3.5 cm thick, the stipe is slightly enlarged at the base; the surface is white, and smooth above and below the ring. The veil of the stipe is membranous, thick, white, and forms a persistent ring with a smooth upper and lower surface. The base of the stipe is typically yellow when bruised and smells of phenol.[4] Yellow staining rhizomorphs at the base of Agaricus placomyces specimens The spores are 4–6.0 x 3.5–4.5 µm, smooth, and elliptical; the spore print is blackish-brown

Habitat:

Agaricus placomyces is saprobic. In addition, it grows in groups under hardwoods and in mixed woods during summer and fall. It is generally found east of the Rocky Mountains and northern in distribution. Generally, it is solitary, living in either small groups, or clusters on disturbed ground under conifers. Unlike many other Agaricus species, it fruits from mid to late winter rather than during the late spring, summer and early fall

Notes:

For some people, Agaricus placomyces can be toxic. Like other phenolic-odored Agaricus species, it can cause gastrointestinal upsets. Other people, who are not affected by the toxicity, may find it edible. The mushroom's taste is not distinctive and somewhat unpleasant; the odor is usually unpleasant, but not necessarily distinctive. The flesh is white, and the base becomes yellow when bruised. spotted in the forest on the north limit of the weet meadow near my house

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8 Comments

Argy,my friend :) i would love to have you and Leuba as walk buddy's here or there in Austrália :) with your's knowlegde in nature issues it would bee awesome,who know´s :)
I think you are rigth in the ID it seems like a Agaricus placomyces,i've been seeing pictures based in your tip and it mathes,thanks for one more id :)

Mark Ridgway
Mark Ridgway 11 years ago

Sounds good to me Antonio.... mind AND heart AND minimal suffering. For me the mirror is great because the legs don't bend so good :) I think I would like very much to walk national parks with you even with stiff legs. My best guess here would be Agaricus placomyces but many are similar.

:ID Argy my friend ,thanks for your practical vision on the issue,you and Pouihi are rigth,i'am a sentimentalist even with mushroom´s :) but i dont feel guilty :) only i dont have the will to do it i prefer the mirror and next time il'll have a scale so we can have the size,but i'am not the kind of zen guy that dont want to hurt the flowers or the flee's(like someone i know:),no ,humans allways used what they need and if they take a few practical measures like you say,no big problem,but even so i like more them in the place and it give me a certain plasure to left the place as it was,i train those "skills" along ago,in gerês national park,we make wild camping allover the area even in forbiden plcaces like the montain meadows,and we have to left the place intact so the rangers :) could not spott us :)

Mark Ridgway
Mark Ridgway 11 years ago

I think we as humans can be smarter. Why do fruits appear on plants.. the plant 'wants' some creature to use it and therefore assist it. It's the same with fruiting bodies on fungi. If you pick an apple from a tree should you feel guilty? Life can benefit from life as well as suffer. Just try to make the most intelligent choice for every circumstance. With macro-fungi, if there is only one or two, I leave it for someone else to see. If there are many it is ok to knock one over and leave it..... Back to this fungi I'm pretty sure we can just see some volva in pic 3. Also sizes would be a big help Antonio. Nice mushroom.

Thanks Pouihi,i have to "confess" that my problem is that i dont want to disturb to much nature only for the porpouse of spotting :) it's a bit silly i know,but i dont like to cut them,or brack them only to photographe the gills,i have to take a little mirror (Daniele Pralog idea) so i can photo the gills without arming the mushroom :) it's my budist ribbet :) and my boy scout,Baden Powel philosophie,let the place exactly as you found it :)

Thanks Kunzah i'll check it

mauna Kunzah
mauna Kunzah 11 years ago

Actually, another guess of mine is Agaricus.

mauna Kunzah
mauna Kunzah 11 years ago

Looks like it might belong to the genus Amanita.

Braga, Portugal

Spotted on Oct 13, 2012
Submitted on Nov 3, 2012

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