''Gymnopilus luteofolius'', known as the yellow-gilled gymnopilus, is a large and widely distributed

mushroom A mushroom or toadstool is the fleshy, spore-bearing fruiting body of a fungus, typically produced above ground, on soil, or on its food source. ''Toadstool'' generally denotes one poisonous to humans. The standard for the name "mushroom" is ...

that grows in dense clusters on dead hardwoods and conifers. It grows in late July to November in the east and in the winter on the west coast of North America. It has a rusty orange

spore print 300px, Making a spore print of the mushroom ''Volvariella volvacea'' shown in composite: (photo lower half) mushroom cap laid on white and dark paper; (photo upper half) cap removed after 24 hours showing pinkish-tan spore print. A 3.5-centimeter ...

and a bitter taste.

Systematics

''Gymnopilus luteofolius'' was first described as ''Agaricus luteofolius'' by

Charles Horton Peck Charles Horton Peck (March 30, 1833 – July 11, 1917) was an American mycologist of the 19th and early 20th centuries. He was the New York State Botanist from 1867 to 1915, a period in which he described over 2,700 species of North American fu ...

in 1875. It was renamed ''Pholiota luteofolius'' by

Pier Andrea Saccardo Pier Andrea Saccardo (23 April 1845 in Treviso, Treviso – 12 February 1920 in Padua) was an Italian botanist and mycologist. Life Saccardo studied at the Lyceum in Venice, and then at the Technical Institute of the University of Padua ...

in 1887, and was given its current name by mycologist

Rolf Singer Rolf Singer (June 23, 1906 – January 18, 1994) was a German-born mycologist and one of the most important taxonomists of gilled mushrooms (agarics) in the 20th century. After receiving his Ph.D. at the University of Vienna in 1931 he worked ...

in 1951.

Description

The

fruit bodies The sporocarp (also known as fruiting body, fruit body or fruitbody) of fungi is a multicellular structure on which spore-producing structures, such as basidia or asci, are borne. The fruitbody is part of the sexual phase of a fungal life c ...

of ''Gymnopilus luteofolius'' have reddish to purplish to yellow caps in diameter, which often develop green stains. This cap surface is covered with fasciculate scales that start out purplish, soon fade to brick red, and finally fades to yellow as the mushroom matures. The context is reddish to light lavender, fading to yellowish as the mushroom matures. The

gills A gill () is a respiratory organ that many aquatic organisms use to extract dissolved oxygen from water and to excrete carbon dioxide. The gills of some species, such as hermit crabs, have adapted to allow respiration on land provided they are ...

have adnate attachment and start off yellow, turning rusty brown as the spores mature. The stipe is the same color as the cap, often dusted with rusty brown spores, fibrillose, measuring 3–9 by 3–10 mm thick, equal to enlarged near the base. The stipe often has greenish stains near the base. The taste is bitter. Gymnopilus luteofolius spores

The spores are bright rusty brown in deposit, measuring 6–8.5 x 4–4.5

μm The micrometre ( international spelling as used by the International Bureau of Weights and Measures; SI symbol: μm) or micrometer (American spelling), also commonly known as a micron, is a unit of length in the International System of Unit ...

, ellipsoid to subellipsoid, inequilateral, roughened and dextrinoid, with no germ pore. The

basidia A basidium () is a microscopic sporangium (a spore-producing structure) found on the hymenophore of fruiting bodies of basidiomycete fungi which are also called tertiary mycelium, developed from secondary mycelium. Tertiary mycelium is highly- ...

measure 24–28 x 6–7 μm and are 4-spored. The basidioles are often brown. The pleurocystidia ( cystidia on the gill face) measures 30–38 x 5–10 μm, hyaline, fusoid to subventricose. The cystidia on the gill edge (cheilocystidia) measures 23–28 x 4–7 μm, ventricose to flash shaped, often

capitate The capitate bone is a bone in the human wrist found in the center of the carpal bone region, located at the distal end of the radius and ulna bones. It articulates with the third metacarpal bone (the middle finger) and forms the third carpomet ...

. The lamellar trama is made up of parallel hyphae 5–18 μm across, frequently septate, with yellowish

pigment A pigment is a colored material that is completely or nearly insoluble in water. In contrast, dyes are typically soluble, at least at some stage in their use. Generally dyes are often organic compounds whereas pigments are often inorganic comp ...

that is dissolved by potassium hydroxide. The pileus trama is interwoven, and the pileus cuticle has brown tufts of brown incrusted hyphae. The pileocystidia measure 44–53 μm, and are club-shaped,

cylindrical A cylinder (from ) has traditionally been a three-dimensional solid, one of the most basic of curvilinear geometric shapes. In elementary geometry, it is considered a prism with a circle as its base. A cylinder may also be defined as an in ...

or ventricose terminal elements on the hyphae that forms the scales on the cap. Cystidia on the stipe (caulocystidia) are 20–63 x 3–15 μm, club shaped, ventricose or flask shaped. The gill trama and pileus trama are pale yellowish-brown in KOH and reddish brown in

Melzer's reagent Melzer's reagent (also known as Melzer's iodine reagent, Melzer's solution or informally as Melzer's) is a chemical reagent used by mycologists to assist with the identification of fungi, and by phytopathologists for fungi that are plant pathog ...

. Clamp connections are present.

References

External links

''Gymnopilus luteofolius''
at mushroomobserver.org
''Gymnopilus luteofolius'' occurrence map
* {{Taxonbar, from=Q5624857 Fungi described in 1875 Fungi of North America luteofolius Psychoactive fungi Psychedelic tryptamine carriers Taxa named by Charles Horton Peck

Systematics

Description

See also

References

External links