Community find

American Blusher

Amanita amerirubescens complex

Group

gilled mushroom

Spore print

White

Size

Cap diameter 5-15 cm; Stipe 5-20 cm long and 1-2 cm thick.

Season

Typically fruits from early summer through autumn (June to October in temperate regions).

Habitat

Primarily in mixed forests, forming associations with various deciduous and coniferous trees like oaks and pines.

Distribution

Widely distributed across North America, particularly in eastern regions.

Key characteristics

Yellowish-brown to tan cap with small warts, white gills that bruise reddish-pink, and a prominent ring on the stem. The stem base often shows reddish staining where damaged.

Fruiting body

Cap is convex to flat, 5-15cm wide, with patchy universal veil remnants (warts). Hymenophore consists of free, crowded white gills. Stipe is 5-20cm long, featuring a skirt-like annulus (ring) and a bulbous base. Flesh stains pinkish-red when bruised.

How to recognise it

Look for the characteristic 'blushing' effect where the flesh or exterior surfaces turn reddish or pinkish when cut, bruised, or eaten by insects. Check for a white spore print and a bulbous stem base.

Look-alikes

Amanita pantherina (lacks the reddish staining), Amanita flavorubens (more yellow overall), and members of the Amanita muscaria complex.

Ecological role

Mycorrhizal, forming a symbiotic relationship with the root systems of trees to exchange nutrients and water.

Notes

The 'blusher' name refers to the distinctive color change of the flesh upon exposure to air. This species is part of a complex, meaning there are several genetically distinct but visually similar species grouped under this name in North America.