Synonyms: Calloria xanthostigma, Hymenoscyphus rufulus, Mollisia xanthostigma, Orbilia alnea, Orbilia botulispora, Orbilia coccinella, Orbilia delicatula, Orbilia hypothallosa, Orbilia leucostigma, Orbilia microspora, Orbilia millispora, Orbilia paradoxa, Orbilia rubella, Peziza delicatula, Peziza rufula, Peziza xanthostigma, Pezizella rufula.
Common name: common glasscup.
Orbilia xanthostigma is a species of fungus in the family Orbiliaceae, characterized by its bright yellow to orange apothecia with a distinct stigma-like mark. In East and Central Texas, it typically fruits on decaying wood, particularly oak and pine, from late summer to early winter. The fungus is often found in moist, shaded areas, such as woodland edges and stream banks, where it plays a role in decomposing organic matter.
Small stagshorn mushrooms Calocera cornea together with tiny glasscup fungus Orbilia xanthostigma(?) on a recently fallen oak in Big Creek Scenic Area of Sam Houston National Forest. Shepherd, Texas, January 19, 2020
Lone Star Hiking Trail, Coldspring, TX 77331, USA
Common glasscup mushrooms (Orbilia xanthostigma) on a wet pine log on Richards Loop Trail in Sam Houston National Forest. Texas, October 2, 2021Lone Star Hiking Trail, Richards, TX 77873, USA
Common glasscup mushrooms (Orbilia xanthostigma) on a wet pine log without bark on Richards Loop Trail in Sam Houston National Forest. Texas, October 2, 2021Lone Star Hiking Trail, Richards, TX 77873, USAObservations of Orbilia xanthostigma in East and Central Texas reveal its growth habits and preferred substrates. The fungus was found growing alongside Calocera cornea on a recently fallen oak in the Big Creek Scenic Area of Sam Houston National Forest. Additionally, it was observed on wet pine logs on Richards Loop Trail in the same forest, both with and without bark. These findings suggest that Orbilia xanthostigma thrives in moist environments and can colonize various types of decaying wood, including oak and pine. The presence of this fungus on recently fallen trees and logs indicates its ability to quickly inhabit new substrates, highlighting its role as a decomposer in East and Central Texas ecosystems. The observations were made in January 2020 and October 2021, indicating a possible year-round presence.
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