Leucoagaricus americanus
Encyclopedia
Leucoagaricus americanus is a mushroom
in the genus
Leucoagaricus
, native to North America
. It was first described by Charles Horton Peck
, an American mycologist of the 19th and early 20th centuries, in 2000. It grows in almost all waste places, stumps and grounds. It is considered edible, but it might be harmful
to ingest the mushroom
sometimes.
is 3–15 cm and oval
in shape when immature, becoming convex to flat when fully grown. The cap
feels dry and smooth at the beginning, but gradually gets reddish to reddish brown scales. It is white in color but reddens with maturity
or after being handled. The gills are free from the stipe
and lie close. They appear white when young and are stained pinkish to maroon. The stipe
is 7–14 cm long, often enlarged at or below the middle and tapering toward the base. It appears white at first, staining or aging pink or reddish brown. It feels smooth with its silky hairs. The membranous veil
leaves a white double edged ring on the upper stalk which may disappear in age. the spores are white to cream in color measuring 8-10 x 6-7.5 µm. The flesh
is white throughout. It looks bruising yellow to orange when young but drying reddish when mature. The flesh
is thick and discolors when cut, bruised or damaged.
Mushroom
A mushroom is the fleshy, spore-bearing fruiting body of a fungus, typically produced above ground on soil or on its food source. The standard for the name "mushroom" is the cultivated white button mushroom, Agaricus bisporus; hence the word "mushroom" is most often applied to those fungi that...
in the genus
Genus
In biology, a genus is a low-level taxonomic rank used in the biological classification of living and fossil organisms, which is an example of definition by genus and differentia...
Leucoagaricus
Leucoagaricus
Leucoagaricus is a genus of fungi in the family Agaricaceae. The genus contains approximately 90 species.-External links:* at Index Fungorum...
, native to North America
North America
North America is a continent wholly within the Northern Hemisphere and almost wholly within the Western Hemisphere. It is also considered a northern subcontinent of the Americas...
. It was first described by Charles Horton Peck
Charles Horton Peck
Charles Horton Peck, born March 30, 1833 in Sand Lake, New York, died 1917 in Albany, New York, was an American mycologist of the 19th and early 20th centuries...
, an American mycologist of the 19th and early 20th centuries, in 2000. It grows in almost all waste places, stumps and grounds. It is considered edible, but it might be harmful
Mushroom poisoning
Mushroom poisoning refers to harmful effects from ingestion of toxic substances present in a mushroom. These symptoms can vary from slight gastrointestinal discomfort to death. The toxins present are secondary metabolites produced in specific biochemical pathways in the fungal cells...
to ingest the mushroom
Mushroom
A mushroom is the fleshy, spore-bearing fruiting body of a fungus, typically produced above ground on soil or on its food source. The standard for the name "mushroom" is the cultivated white button mushroom, Agaricus bisporus; hence the word "mushroom" is most often applied to those fungi that...
sometimes.
Description
The capPileus (mycology)
The pileus is the technical name for the cap, or cap-like part, of a basidiocarp or ascocarp that supports a spore-bearing surface, the hymenium. The hymenium may consist of lamellae, tubes, or teeth, on the underside of the pileus...
is 3–15 cm and oval
Oval
An oval is any curve resembling an egg or an ellipse, such as a Cassini oval. The term does not have a precise mathematical definition except in one area oval , but it may also refer to:* A sporting arena of oval shape** a cricket field...
in shape when immature, becoming convex to flat when fully grown. The cap
Pileus (mycology)
The pileus is the technical name for the cap, or cap-like part, of a basidiocarp or ascocarp that supports a spore-bearing surface, the hymenium. The hymenium may consist of lamellae, tubes, or teeth, on the underside of the pileus...
feels dry and smooth at the beginning, but gradually gets reddish to reddish brown scales. It is white in color but reddens with maturity
Maturity
Maturity may refer to:*Sexual maturity, the stage when an organism can reproduce, though it is distinct from adulthood*Mature technology, a term indicating that a technology has been in use and development for long enough that most of its initial problems have been overcome*Maturity , a geological...
or after being handled. The gills are free from the stipe
Stipe (mycology)
thumb|150px|right|Diagram of a [[basidiomycete]] stipe with an [[annulus |annulus]] and [[volva |volva]]In mycology a stipe refers to the stem or stalk-like feature supporting the cap of a mushroom. Like all tissues of the mushroom other than the hymenium, the stipe is composed of sterile hyphal...
and lie close. They appear white when young and are stained pinkish to maroon. The stipe
Stipe (mycology)
thumb|150px|right|Diagram of a [[basidiomycete]] stipe with an [[annulus |annulus]] and [[volva |volva]]In mycology a stipe refers to the stem or stalk-like feature supporting the cap of a mushroom. Like all tissues of the mushroom other than the hymenium, the stipe is composed of sterile hyphal...
is 7–14 cm long, often enlarged at or below the middle and tapering toward the base. It appears white at first, staining or aging pink or reddish brown. It feels smooth with its silky hairs. The membranous veil
Universal veil
In mycology, a universal veil is a temporary membranous tissue that fully envelops immature fruiting bodies of certain gilled mushrooms. The developing Caesar's mushroom , for example, which may resemble a small white sphere at this point, is protected by this structure...
leaves a white double edged ring on the upper stalk which may disappear in age. the spores are white to cream in color measuring 8-10 x 6-7.5 µm. The flesh
Trama (mycology)
In mycology trama is a term for the inner, fleshy portion of a mushroom's basidiocarp, or fruit body. It is distinct from the outer layer of tissue, known as the pileipellis or cuticle, and from the spore-bearing tissue layer known as the hymenium....
is white throughout. It looks bruising yellow to orange when young but drying reddish when mature. The flesh
Trama (mycology)
In mycology trama is a term for the inner, fleshy portion of a mushroom's basidiocarp, or fruit body. It is distinct from the outer layer of tissue, known as the pileipellis or cuticle, and from the spore-bearing tissue layer known as the hymenium....
is thick and discolors when cut, bruised or damaged.