Common names: plantpot dapperling, Yellow Houseplant Mushroom, flowerpot parasol.
Extract from Wikipedia article: Leucocoprinus birnbaumii is a species of gilled mushroom in the family Agaricaceae. It is common in the tropics and subtropics, but in temperate regions frequently occurs in greenhouses and flowerpots, hence its common names of flowerpot parasol and plantpot dapperling. The fruit body is mildly poisonous, if consumed in large quantities.
Leucocoprinus birnbaumii is a small to medium-sized mushroom with a bright yellow to orange cap, typically 1-4 cm in diameter, and a slender stem. It grows in clusters on soil, dung, and decaying organic matter. In East and Central Texas, it is commonly found in gardens, greenhouses, and outdoor areas with rich soil, often near plants such as palms, ferns, and bromeliads. Fruitings typically occur from spring to fall, with a peak in summer months. The species is widely distributed in the region and can be abundant in some areas, particularly where moisture and nutrients are plentiful.
Plantpot dapperling mushrooms (Leucocoprinus birnbaumii) in TAMU Holistic Garden in Texas A and M University. College Station, Texas, September 20, 2009
Yellow parasol mushroom (Leucocoprinus birnbaumii, Lepiota lutea) at Lost Pines Trail in Bastrop State Park. Bastrop, Texas, June 16, 2012 Lost Pines Trail, Bastrop County, Texas, 78602, United States
Yellow pot-plant mushrooms (Leucocoprinus birnbaumii) on Forest Service Road 203 in Sam Houston National Forest. Richards, Texas, September 28, 2013 Forest Service Road 203, Sam Houston National Forest, Montgomery, TX 77356, USA
Yellow parasol mushrooms (Leucocoprinus birnbaumii, Lepiota lutea) in Bastrop State Park. Bastrop, Texas, October 5, 2013 Park Road 1-A, Bastrop, TX 78602, USA
Dry yellow parasol mushroom (Leucocoprinus birnbaumii, Lepiota lutea) on Lost Pines Trail in Bastrop State Park. Bastrop, Texas, October 5, 2013 Park Rd 1-A, Bastrop, TX 78602, USA
Young yellow parasol mushroom (Leucocoprinus birnbaumii, Lepiota lutea) on Lost Pines Trail in Bastrop State Park. Bastrop, Texas, October 5, 2013 Park Rd 1-A, Bastrop, TX 78602, USA
Yellow parasol mushrooms (Leucocoprinus birnbaumii) in Bee Creek Park. College Station, Texas, November 8, 2017 Bee Creek, College Station, TX 77840, USA
Close up of yellow parasol mushrooms (Leucocoprinus birnbaumii) in Bee Creek Park. College Station, Texas, November 8, 2017 Bee Creek, College Station, TX 77840, USA
Yellow pot-plant mushrooms (Leucocoprinus birnbaumii) on mulch under a live oak on New Main Drive on campus of Texas A and M University. College Station, Texas, July 10, 2018 New Main Dr, College Station, TX 77840, USA
Group of yellow pot-plant mushrooms (Leucocoprinus birnbaumii) on mulch under a live oak on New Main Drive on campus of Texas A and M University. College Station, Texas, July 10, 2018 New Main Dr, College Station, TX 77840, USA
Masses of yellow pot-plant mushrooms (Leucocoprinus birnbaumii) on mulch under a live oak on New Main Drive on campus of Texas A and M University. College Station, Texas, July 10, 2018 New Main Dr, College Station, TX 77840, USA
Yellow parasol mushrooms (Leucocoprinus birnbaumii) under oaks on New Main Drive on campus of Texas A and M University. College Station, Texas, September 14, 2018 1049 Texas Ave, College Station, TX 77840, USA
Yellow parasol mushrooms (Leucocoprinus birnbaumii) on wood chips on campus of Texas A and M University. College Station, Texas, September 14, 2018 New Main Dr, College Station, TX 77840, USA
Yellow parasol mushrooms (Leucocoprinus birnbaumii) on mulch under a live oak at New Main Drive on campus of Texas A and M University. College Station, Texas, October 1, 2018 New Main Dr, College Station, TX 77840, USA
Young and mature yellow parasol mushrooms (Leucocoprinus birnbaumii) on mulch under a live oak at New Main Drive on campus of Texas A and M University. College Station, Texas, October 1, 2018 New Main Dr, College Station, TX 77840, USA
Masses of yellow parasol mushrooms (Leucocoprinus birnbaumii) on mulch under a live oak at New Main Drive on campus of Texas A and M University. College Station, Texas, October 1, 2018 New Main Dr, College Station, TX 77840, USA
Yellow pot-plant mushrooms (Leucocoprinus birnbaumii) among periwinkle near Civil Engineering Building on campus of Texas A and M University. College Station, Texas, September 22, 2019 Civil Engineering Bldg, Ross St, College Station, TX 77840, USA
Plantpot dapperling mushrooms (Leucocoprinus birnbaumii) in grass on a pipeline right of way in Lick Creek Park. College Station, Texas, June 1, 2021 Yaupon Loop, College Station, TX 77845, USA
Plantpot dapperling mushrooms (Leucocoprinus birnbaumii) with a cross section on a pipeline right of way in Lick Creek Park. College Station, Texas, June 1, 2021 Yaupon Loop, College Station, TX 77845, USA
Plantpot dapperling mushroom (Leucocoprinus birnbaumii) on a fallen oak with resurrection fern in Lick Creek Park. College Station, Texas, July 6, 2021 14802 Rock Prairie Rd, College Station, TX 77845, USA
Plantpot dapperling mushrooms (Leucocoprinus birnbaumii) on Richards Loop Trail in Sam Houston National Forest. Texas, August 25, 2022 Little Lake Creek Loop Trail, Montgomery County, Texas, 77873, United States
AI-generated summary of observations
Observations of Leucocoprinus birnbaumii in East and Central Texas reveal that the fungus grows in various environments, including gardens, parks, and forests. It has been spotted in mulch, wood chips, and soil under live oaks, as well as on fallen trees and among periwinkle plants. The mushrooms have been found in multiple locations, including College Station, Bastrop, and Richards, Texas, between 2009 and 2022. They typically appear in late summer to early fall, with some observations in June and July. The fungus grows in masses, with both young and mature mushrooms present at the same time. It is often found in areas with rich organic matter, such as mulch and wood chips, suggesting a preference for nutrient-rich environments. Overall, Leucocoprinus birnbaumii appears to be a common and widespread species in East and Central Texas.