Agaricus julius was first described by American mycologist Richard W. Kerrigan in 2016.[2]
Description
The cap is 5–15cm (2.0–5.9in) wide, sometimes larger. The appearance of this mushroom is very similar to the store-bought portabello mushroom. It stains slightly yellow where damaged or nicked. The cap is light brown with a scaled pattern. When young, it has a cottony veil covering the gills. The mushroom can become quite large as the cap opens. The gills are initially pinkish-gray to pink when young, then turning brown at maturity; crowded; not attached to the stipe. The stipe is 2–3cm (0.79–1.18in) wide, and 5–15cm (2.0–5.9in) long. The stalk is usually shaggy when young, becoming smooth at maturity, curved with a larger bulbous base. Once the cap opens it leaves a thin yellowish to light brown skirt-like ring on the stipe. When mature, the stalk can turn darker above the ring. The cap flesh can stain yellow in fresh specimens where nicked or handled. It has a very distinct cherry-almond smell. The spore color is chocolate brown.[3]
In culture
In March 2025, with the signing of bill HB25-1091[4], A. julius became the state mushroom of Colorado.
References
↑ Kerrigan, Richard W. (2016). Agaricus of North America (Memoirs of The New York Botanical Garden Volume 114). Bronx, New York, USA: NYBG Press.
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