Agaricus augustus identification

About mushroom

Cap 10-20cm across, obtusely ovoid at first expanding convex, yellowish-brown covered in chestnut-brown fibrous scales.

Stem 100-200 x 20-40mm, whitish with small scales below the ring which discolour brownish with age, bruising yellowish; ring white, large and pendulous. Flesh thick and white, becoming tinged reddish with age.
Taste mushroomy, smell strongly of bitter almonds.

Gills free, white at first then brown.
Cheilocystidia formed of chains of bladder-shaped elements.
Spore print purple brown.

Habitat in coniferous and deciduous woods. Season late summer to autumn. Uncommon.
Distribution, America and Europe.


The beautiful Agaricus augustus is considered by many to be the most delicious of the edible Agaricus species. It is a happy find for any mushroom hunter, although it is reported to be difficult to find them before the worms do! Like other Agaricus species, the Prince grows on rich organic substrate, often as a litter decomposer in nature. It is probably a secondary decomposer, which means that bacteria and other fungi have to break down raw materials before Agaricus can grow. On a commercial scale this is the process known as composting.

The Prince can have caps about one foot (30 cm) in diameter, although many mycophagists prefer to eat them when unexpanded because of their better texture and odor. The gills turn chocolaty brown when the spores are mature. However, even somewhat expanded caps can show gills that are still white. The beautiful veil and scruffy to shaggy stem (at least when young) are also hallmarks of this species.

Agaricus augustus photos

More info about Agaricus augustus mushroom

Stem type:
Ring on stem
Grows on the ground
Spore colour:
Purplish to black
Cap type:
Convex to shield shaped
Fungus colour:
White to cream
Normal size:
over 15cm
North America
Mushroom has distinct or odd smell (non mushroomy)
Agaric auguste, ?ri?scsiperke, okkerpikkelyes csiperke, Riesenegerling, The Prince
Last modification: 2015-10-01 23:58:38

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