Agaricus californicus

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Agaricus californicus
Agaricus californicus BC.jpg
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Fungi
Division: Basidiomycota
Class: Agaricomycetes
Order: Agaricales
Family: Agaricaceae
Genus: Agaricus
Species:
A. californicus
Binomial name
Agaricus californicus
Peck (1895) [1]
Agaricus californicus
Information icon.svg
Gills icon.png Gills on hymenium
Convex cap icon.svg Cap is convex
Free gills icon2.svg Hymenium is free
Ring stipe icon.svg Stipe has a ring
Transparent spore print icon.svg
Spore print is brown
Saprotrophic fungus.svgEcology is saprotrophic
Mycomorphbox Poison.pngEdibility is poisonous

Agaricus californicus, commonly known as the mock meadow mushroom, [2] or California agaricus, is a poisonous mushroom in the section Xanthodermati of the genus Agaricus . [3]

Contents

It is mildly poisonous, causing gastrointestinal upset in many individuals. The etiology of these symptoms is unclear and some individuals can eat it without experiencing symptoms, but since there is no way to tell who can eat the mushroom safely it is generally recommended against. [4] [3]

Description

The caps are 5–12 cm (2.0–4.7 in) wide, white, sometimes with a grayish-tan center, dry, and either unchanged or yellowing slightly when bruised. [5] The stalk is 3–10 cm (1.2–3.9 in) long and 1–2 wide, perhaps larger at the base. [5] The spores are brown and smooth. [5]

Differentiating A. californicus

Agaricus californicus is similar in general appearance to many other Agaricus species, especially to A. arvensis, [5] A. bisporus, A. campestris, [5] A. cupreobrunneus, and which are commonly collected for the table. Since A. californicus is toxic, differentiating it from other similar mushrooms is important.

Agaricus californicus – like many other Agaricus species of the section Xanthodermati – displays a yellowing reaction where its flesh has been damaged. Unlike A. xanthodermus [5] (a close relative in the section Xanthodermati), A. californicus's yellowing reaction is not always readily apparent and the annulus is smaller. Even in specimens where the reaction is not immediately apparent the addition of a basic solution such as NaOH or even Lysol will cause the reaction to become quite noticeable, making this a convenient way to distinguish between A. californicus and similar mushrooms. [3]

See also

Related Research Articles

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<i>Agaricus xanthodermus</i> Species of fungus

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<i>Tricholoma equestre</i> Species of fungus

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<i>Coprinopsis atramentaria</i> Species of fungus

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<i>Agaricus arvensis</i> Species of fungus

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<i>Agaricus campestris</i> Species of fungus

Agaricus campestris is a widely eaten gilled mushroom closely related to the cultivated A. bisporus. A. campestris is commonly known as the field mushroom or, in North America, meadow mushroom.

<i>Clitocybe nebularis</i> Species of fungus

Clitocybe nebularis or Lepista nebularis, commonly known as the clouded agaric, cloudy clitocybe, or cloud funnel, is an abundant gilled fungus which appears both in conifer-dominated forests and broad-leaved woodland in Europe and North America. Appearing in Britain from mid to late autumn, it is edible, but may cause gastrointestinal issues.

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<i>Agaricus silvicola</i> Species of fungus

Agaricus silvicola, also known as the wood mushroom or woodland agaricus, is a species of Agaricus mushroom related to the button mushroom. A. silvicola is a member of Agaricus section Arvenses, a group of morphologically similar mushrooms. A. silvicola, like other species in Agaricus section Arvenses, exhibits a positive Schäffer's reaction and potassium hydroxide reaction, and smells of almonds or anise.

<i>Russula sanguinaria</i> Species of fungus

Russula sanguinaria, commonly known as the bloody brittlegill or rosey russula, is a strikingly coloured mushroom of the genus Russula, which has the common name of brittlegills. It is bright blood-red, inedible, and grows in association with coniferous trees. It was previously widely known as Russula sanguinea.

<i>Leucoagaricus leucothites</i> Species of fungus

Leucoagaricus leucothites, commonly known as the smooth parasol, woman on motorcycle, ma'am on motorcycle, white dapperling, or white agaricus mushroom, is a species of agaric fungus. The species was originally described as Agaricus leucothites by Carlo Vittadini in 1835, and bears similarity to species of that genus. Solomon Wasser transferred it to Leucoagaricus in 1977. While sometimes regarded as edible, the species is suspected of being poisonous due to gastric-upset-causing toxins. It could also be confused with the deadly Amanita ocreata.

<i>Agaricus semotus</i> Species of fungus

Agaricus semotus is a woodland mushroom of the fungus order Agaricales. Like many of its relatives, it can be found spread throughout wooded, moist areas in the southern United States, and has been found in areas ranging from California to Florida. It is also indigenous to Great Britain and Europe. A. semotus has also been collected in New Zealand. Although various authors disagree about its edibility, its modest size prevents it from being a significant source of nutrition.

<i>Agaricus albolutescens</i> Species of fungus

Agaricus albolutescens, commonly known as the amber-staining agaricus, is a moderate-sized, stocky-statured mushroom with a pleasant odor; it bruises slowly but persistently yellow.

<i>Agrocybe pediades</i> Species of fungus

Agrocybe pediades, commonly known as the common fieldcap or common agrocybe, is a typically lawn and other types of grassland mushroom, but can also grow on mulch containing horse manure. It was first described as Agaricus pediades by Swedish mycologist Elias Magnus Fries in 1821, and moved to its current genus Agrocybe by Victor Fayod in 1889. A synonym for this mushroom is Agrocybe semiorbicularis, though some guides list these separately. Technically it is edible, but it could be confused with poisonous species, including one of the genus Hebeloma.

<i>Lactarius rufulus</i> Species of fungus

Lactarius rufulus, commonly known as the rufous candy cap, is a species of fungus in the family Russulaceae. The fruit bodies have fleshy brownish-red caps up to 10 cm (3.9 in) wide, and closely spaced pinkish-yellow gills. The stem is up to 12 cm (4.7 in) long and 3 cm (1.2 in) thick and colored similarly to the cap. The species, known only from California, Arizona, and Mexico, grows on the ground in leaf litter near oak trees. The fruit bodies resembles those of L. rufus, but L. rufulus tends to grow in clusters at a common base, rather than solitarily or in groups. A distinguishing microscopic characteristic is the near absence of large, spherical cells called sphaerocysts that are otherwise common in Lactarius species. Lactarius rufulus mushrooms are edible, and have an odor resembling maple syrup. They have been used to flavor confections and desserts.

<i>Agaricus hondensis</i> Species of fungus in the family Agaricaceae

Agaricus hondensis, commonly known as the felt-ringed agaricus, is a species of fungus in the family Agaricaceae. The species was officially described in 1912 by mycologist William Alphonso Murrill, along with three other Agaricus species that have since been placed in synonymy with A. hondensis. Found in the Pacific Northwest region of North America, A. hondensis fruits in the fall under conifers or in mixed forests.

<i>Agaricus cupreobrunneus</i> Species of fungus

Agaricus cupreobrunneus, commonly known as the copper mushrooom or brown field mushroom, is an edible mushroom of the genus Agaricus.

<i>Lactarius xanthogalactus</i> Species of fungus

Lactarius xanthogalactus, commonly known as the yellow-staining milkcap is a poisonous species of fungus in the family Russulaceae. The species is found on the west coast of the United States and grows in the ground in association with hardwood and conifer trees. There are several other Lactarius species that bear resemblance to L. xanthogalactus, but most can be distinguished by differences in staining reactions, macroscopic characteristics, or habitat.

References

  1. Peck CH (1895). "New species of Fungi". Bulletin of the Torrey Botanical Club. 22 (5): 198–211. doi:10.2307/2478162. JSTOR   2478162.
  2. Arora, David (February 1, 1991). All That the Rain Promises and More: A Hip Pocket Guide to Western Mushrooms. ISBN   9780898153880.
  3. 1 2 3 Arora D. 1986. Mushrooms Demystified: A Comprehensive Guide to the Fleshy Fungi (2nd edition). Berkeley: Ten Speed Press. ISBN   0-89815-169-4.
  4. "California Fungi—Agaricus californicus". MykoWeb. Retrieved 2010-07-27.
  5. 1 2 3 4 5 6 Davis, R. Michael; Sommer, Robert; Menge, John A. (2012). Field Guide to Mushrooms of Western North America. Berkeley: University of California Press. pp. 223–224. ISBN   978-0-520-95360-4. OCLC   797915861.

Agaricus californicus in Index Fungorum
Agaricus californicus in MycoBank .