What You Should Know
Agaricus dulcidulus is a small mushroom in the family Agaricaceae of the order Agaricales, found in deciduous forests of Europe, North America, North Africa and Asia.
These mycorrhizal species grow in close relation with different oak species. As a substrate, the fungus prefers moist soil with leaf rot. Basidiocarps appear from late July to early October, depending on the microclimate.
It's edible, but it's small and often sporadic.
Other names: Rosy Wood Mushroom.
Agaricus dulcidulus Mushroom Identification
2-7 cm in diameter. Almost spherical or convex at first, with curved edges and flattened caps as they mature. Its surface is densely covered with pink or purple-brown radial fibrils, darkest near the center. The flesh of the cap gradually turns yellow as it is cut and smells like almonds.
Free, crowded; pale pink, becoming a very dark purplish-brown with age, but retaining lighter gill edges.
2-5 cm height and 0.4-0.8 cm diameter, bulbous or at least rod-shaped at the base, white near the apex, turning brown towards the base. Young stems bear a fragile pendulous white ring that may be partially or absent in mature specimens. The cut stem turns yellow, often orange and it smells like almonds.
Ellipsoidal, smooth, 4.5-6.0 x 3.5-4.0μm; inamyloid.
Dark purplish brown.
Odor and Taste
Smell and taste the almonds.
Agaricus dulcidulus Look-Alikes
It is similar, but on the whole the A. dulcidulus is smaller and has a slender stem, with a paler cap margin, unlike the Lilac Mushroom. It also sometimes has a lilac tinge above the ring, which in itself is more fragile than that of the Lilac Mushroom.
It also smells like almonds, but it's a larger fungus found on conifers.
Agaricus dulcidulus Taxonomy and Etymology
This mushroom was first named and described by Croatian mycologist Stephan Schulzer von Müggenburg (1802 - 1892) in 1874, and the name he gave is still generally accepted today.
The specific epithet dulcidulus comes from the Latin adjective dulcis, meaning sweet. This indicates the sweet/pleasant smell of this mushroom.
Agaricus dulcidulus Synonyms
Agaricus purpurellus (F.H.Møller) F.H.Møller
Agaricus rubelloides Bon
Agaricus rubellus (Gillet) Sacc.
Fungus dulcidulus (Schulzer) Kuntze
Pratella rubella Gillet
Pratella silvatica var. rubella (Gillet) L.Corb.
Psalliota amethystina sensu Lange
Psalliota pallens (J.E.Lange) Rea
Psalliota purpurella F.H.Møller
Psalliota rubella (Gillet) Rea
Psalliota rubella f. pallens J.E.Lange
Photo 1 - Author: Jerzy Opioła (Creative Commons Attribution-Share Alike 4.0 International)
Photo 2 - Author: Petru Damsa (Creative Commons Attribution-Share Alike 3.0 Unported)