Synonyms: Agaricus cesatii, Agaricus variabilis, Claudopus sphaerosporus, Claudopus variabilis, Crepidotus sphaerosporus, Crepidotus subsphaerosporus, Crepidotus variabilis, Dochmiopus sphaerosporus.
Common name: roundspored oysterling.
Extract from Wikipedia article: Crepidotus cesatii, commonly known as the roundspored oysterling, is a species of saprophytic fungus in the family Crepidotaceae with a stipeless sessile cap. It is often found on woody and herbaceous plant debris from many different hosts including conifers, appearing from late summer to winter usually in small scattered groups. Often confused with Crepidotus variabilis, it can be distinguished by its different spores.
Dutch: Rondsporig oorzwammetje, Russian: Крепидот Цезата.
Crepidotus cesatii is a small to medium-sized fungus with a fan-shaped or semicircular cap that ranges in color from yellowish-brown to dark brown. It has a white or pale yellow spore print and grows on decaying wood, typically on logs or stumps. In East and Central Texas, it can be found fruiting during the spring and fall months, often in wooded areas with abundant hardwood trees, such as oak and maple. The fungus is relatively common in this region, particularly in moist environments near streams or rivers.
Tiny roundspored oysterling mushrooms Crepidotus cesatii (spore print brown) on a fallen branch of pecan or may be oak in Lick Creek Park. College Station, Texas, April 29, 2023
Iron Bridge Trail, College Station, Brazos County, Texas, United States
Roundspored oysterling mushrooms (Crepidotus cesatii) on a pecan log witout bark in Lick Creek Park. College Station, Texas, April 29, 2023Racoon Run Trail, College Station, Brazos County, Texas, United States
Underside of roundspored oysterling mushrooms (Crepidotus cesatii) on a pecan log witout bark in Lick Creek Park. College Station, Texas, April 29, 2023Racoon Run Trail, College Station, Brazos County, Texas, United States
Roundspored oysterling mushrooms (Crepidotus cesatii) together with some white corticioid fungus on a pecan log without bark in Lick Creek Park. College Station, Texas, April 29, 2023Racoon Run Trail, College Station, Brazos County, Texas, United States
Caps of roundspored oysterling mushrooms (Crepidotus cesatii) on a pecan log in Lick Creek Park. College Station, Texas, April 29, 2023Racoon Run Trail, College Station, Brazos County, Texas, United States
Gills of roundspored oysterling mushrooms (Crepidotus cesatii) on a pecan log in Lick Creek Park. College Station, Texas, April 29, 2023Racoon Run Trail, College Station, Brazos County, Texas, United States
Roundspored oysterling mushrooms (Crepidotus cesatii) together with some white corticioid fungus on rotting pecan wood in Lick Creek Park. College Station, Texas, April 29, 2023Racoon Run Trail, College Station, Brazos County, Texas, United States
Roundspored oysterling mushrooms (Crepidotus cesatii) on cracked surface of a pecan log in Lick Creek Park. College Station, Texas, April 29, 2023Racoon Run Trail, College Station, Brazos County, Texas, United States
Close-up of roundspored oysterling mushrooms (Crepidotus cesatii) on cracked surface of a pecan log in Lick Creek Park. College Station, Texas, April 29, 2023Racoon Run Trail, College Station, Brazos County, Texas, United States
Roundspored oysterling mushrooms (Crepidotus cesatii) together with some white corticioid fungus on blackened rotting pecan wood in Lick Creek Park. College Station, Texas, April 29, 2023Racoon Run Trail, College Station, Brazos County, Texas, United States
Broken and fallen pecan branch with roundspored oysterling mushrooms (Crepidotus cesatii) in Lick Creek Park. College Station, Texas, April 29, 2023Racoon Run Trail, College Station, Brazos County, Texas, United States
Tissues of oysterling mushrooms Crepidotus cesatii at low magnification, collected in Lick Creek Park. College Station, Texas, April 29, 2023
Basidia and spores of oysterling mushrooms Crepidotus cesatii collected in Lick Creek Park. College Station, Texas, April 29, 2023
Spores of tiny oysterling mushrooms Crepidotus cesatii, in KOH, collected in Lick Creek Park. College Station, Texas, April 29, 2023
Spores of tiny oysterling mushrooms Crepidotus cesatii, in lugol, collected in Lick Creek Park. College Station, Texas, April 29, 2023
Spore size 3.8 - 4 × 3.6 - 3.79 µm, length to width ratio Q = 1 - 1.07.
Spores (in Melzer) of roundspored oysterling mushrooms (Crepidotus cesatii) collected two days before in Lick Creek Park. College Station, Texas, May 1, 2023
Spores (in lactophenol blue) of roundspored oysterling mushrooms (Crepidotus cesatii) collected two days before in Lick Creek Park. College Station, Texas, May 1, 2023In East and Central Texas, specifically in Lick Creek Park, observations of the fungus Crepidotus cesatii were made on multiple fallen branches and logs of pecan trees. The mushrooms were found growing on logs without bark, as well as on cracked surfaces and rotting wood. They were often accompanied by a white corticioid fungus. The caps and gills of the mushrooms were observed, and spore prints were taken, revealing brown-colored spores. Microscopic examination of the tissues, basidia, and spores was also conducted, using various staining methods such as KOH, lugol, Melzer, and lactophenol blue. The observations suggest that Crepidotus cesatii is commonly found on decaying pecan wood in this region, and can grow in a variety of environments, including logs with and without bark.
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