Synonyms: Calloria inflatula, Hyalinia inflatula, Orbilia inflatula, Peziza inflatula.
Hyalorbilia inflatula is a species of fungus in the family Orbiliaceae, characterized by its small, discoid to cupulate apothecia with a whitish to pale yellowish hymenium and a sterile margin. In East and Central Texas, it typically grows on damp soil, moss, or decaying plant material, often in shaded areas. The fungus produces 8-spored asci and has ellipsoidal to fusoid ascospores that are 3-5 septate. It fruits in the spring and fall, with a tendency to occur in areas with rich soil and moderate to high levels of moisture.
Ascomycete mushrooms Hyalorbilia inflatula (Orbilia inflatula) on a trunk of a fallen elm with black Biscogniauxia fungus on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, September 17, 2020
Lone Star Hiking Trail, Montgomery, TX 77356, USA
Close-up of Ascomycete mushrooms Hyalorbilia inflatula (Orbilia inflatula) on a trunk of a fallen elm with black Hypoxylon canker fungus on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, September 17, 2020Lone Star Hiking Trail, Montgomery, TX 77356, USA
Ascomycete mushrooms Hyalorbilia inflatula (Orbilia inflatula) on old crust fungus Biscogniauxia on a fallen elm tree on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, September 26, 2020Lone Star Hiking Trail, Montgomery, TX 77356, USA
Cup mushrooms Hyalorbilia inflatula (Orbilia inflatula) on old crust of Biscogniauxia fungus on a fallen elm tree on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, September 26, 2020Lone Star Hiking Trail, Montgomery, TX 77356, USA
Close-up of Ascomycete mushrooms Hyalorbilia inflatula (Orbilia inflatula) on old crust fungus Biscogniauxia on a fallen elm tree on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, September 26, 2020Lone Star Hiking Trail, Montgomery, TX 77356, USA
Tiny Ascomycete mushrooms Hyalorbilia inflatula (Orbilia inflatula) on on a fallen elm tree on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, September 26, 2020Lone Star Hiking Trail, Montgomery, TX 77356, USA
Ascomycete mushrooms Hyalorbilia inflatula (Orbilia inflatula)(?) on blackened wood in area of Old Washington Town Site in Washington-on-the-Brazos State Historic Site. Washington, Texas, June 6, 202123400 Park Rd 12, Washington, TX 77880, USA
Tiny Ascomycete fungus Hyalorbilia inflatula on a pine log on Lone Star Hiking Trail near Pole Creek in Sam Houston National Forest. Richards, Texas, January 22, 2022Lone Star Hiking Trail, Montgomery County, Texas, United States
Ascomycete cup fungus Hyalorbilia inflatula on underside of a log in Lick Creek Park. College Station, Texas, November 15, 2023Racoon Run Trail, College Station, Brazos County, Texas, United States
Close-up of Ascomycete cup fungus Hyalorbilia inflatula on underside of a log in Lick Creek Park. College Station, Texas, November 15, 2023Racoon Run Trail, College Station, Brazos County, Texas, United States
Tiny cups of Ascomycete fungus Hyalorbilia inflatula on underside of a log in Lick Creek Park. College Station, Texas, November 15, 2023Racoon Run Trail, College Station, Brazos County, Texas, United States
Tissues of Ascomycete fungus Hyalorbilia inflatula at low magnification (x40 objective) collected in Lick Creek Park. College Station, Texas, November 15, 2023
Tissues of Ascomycete fungus Hyalorbilia inflatula from pecan or may be oak, collected in Lick Creek Park. College Station, Texas, November 15, 2023
Many-celled conidia (spores) fallen from a site of a log with Ascomycete cup fungus Hyalorbilia inflatula(?), collected in Hensel Park. College Station, Texas, November 16, 2023
Spore size 23.6 - 25.4 × 3.73 - 4.16 µm, length to width ratio Q = 6.1 - 6.47.
Close-up of tiny cups of Ascomycete fungus Hyalorbilia inflatula together with some thin light brown corticioid fungus on a hardwood log in Lick Creek Park. College Station, Texas, December 20, 2023Iron Bridge Trail, College Station, Brazos County, Texas, United States
Tiny cups of Ascomycete fungus Hyalorbilia inflatula together with some thin light brown corticioid fungus in Lick Creek Park. College Station, Texas, December 20, 2023Iron Bridge Trail, College Station, Brazos County, Texas, United States
Tiny cups of Ascomycete fungus Hyalorbilia inflatula together with some thin light brown Tomentella like fungus in Lick Creek Park. College Station, Texas, December 20, 2023Iron Bridge Trail, College Station, Brazos County, Texas, United States
Tiny cups of Ascomycete fungus Hyalorbilia inflatula in Lick Creek Park. College Station, Texas, December 20, 2023Iron Bridge Trail, College Station, Brazos County, Texas, United States
Cells in Congo Red of Ascomycete fungus Hyalorbilia inflatula collected in Lick Creek Park. College Station, Texas, December 20, 2023
Asci at low magnification of cup fungus Hyalorbilia inflatula collected in Lick Creek Park. College Station, Texas, December 20, 2023
Asci (in Congo Red) of cup fungus Hyalorbilia inflatula collected in Lick Creek Park. College Station, Texas, December 20, 2023Hyalorbilia inflatula was observed on fallen elm trees with black Biscogniauxia or Hypoxylon canker fungus in Sam Houston National Forest, and also on a pine log. In Lick Creek Park, it was found on the underside of logs, often with other fungi like corticioid or Tomentella-like fungi. The fungus produced tiny cups and many-celled conidia. Microscopic examination revealed asci and cells that stained with Congo Red. Observations were made in various locations in East and Central Texas, including Montgomery, Washington, Richards, and College Station, between 2020 and 2023. The fungus was often found on fallen trees, logs, or blackened wood, suggesting a preference for decomposing wood substrates.
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