1 Star2 Stars3 Stars4 Stars5 Stars (5 votes, average: 4.80 out of 5)

Agaricus urinescens

Edible Edible
Autumn Autumn
Spring Spring
Summer Summer

Occasional, but being a large mushroom can often be seen from a distance. Unfortunately maggots are able to spot this mushroom as well and almost all the Macro mushrooms I find are maggot ridden.

Mushroom Type
Common Names Macro Mushroom
Scientific Name Agaricus urinascens
Synonyms Agaricus macrosporus
Season Start May
Season End Nov
Average Mushroom height (CM) 12
Average Cap width (CM) 15
Please note that each and every mushroom you come across may vary in appearance to these photos.


Convex opening out flat becoming scaled and splitting at the edges when mature. Off-white with a pale yellow or brown flush.


Crowded, starting pink and turning to brown then almost black.


White/cream and covered in floccules. The stem tapers towards both the cap and base.


Has a flimsy skirt that can often be washed or brushed off.


White and firm, flushing red/pink in the stem when cut.


Pastures, lawns and anywhere grassy. Growing in rings or sometimes individually.

Possible Confusion

The Yellow Stainer, Agaricus xanthodermus but this mushrooms flesh stains chrome yellow when bruised or cut and smells of Indian ink. Agaricus pilatianus which also stains yellow and smells similar. Both do not smell edible. Can look similar to some of the Amanitas when young and light gilled.

Spore Print

Brown. Ellipsoid.

Taste / Smell

Mushroomy. Should be cooked before consumption.



Other Facts

Even when young these are always full of maggots.


4 comments for Agaricus urinescens

  1. Andy Webb says:

    Really like the taste of this one

  2. Steve Bush says:

    Just eating a huge one now, and tastes fantastic, it was totally free of maggots, amazingly. Great texture and flavour. Seem to be a lot about this year, usually a rare find.

  3. Jim says:

    I think I found 2 of these clumped together, they weighed over 500 grams each and the bulbous stem was at least 15 centimeters long.smelled very good, no sign of maggots.

  4. Barbara Milligan says:

    Just found a clump of them. Will have them for supper tonight. No maggots and in beautiful condition apart from the ones someone ground into the grass. Found 15th December 2019.

Post a Comment

Your email address will not be published. Required fields are marked *