Synonyms: Fomes johnsonianus, Fomitiporella johnsoniana, Phellinus johnsonianus, Poria johnsoniana.
Fulvifomes johnsonianus is a species of fungus that belongs to the family Hymenochaetaceae. It is a perennial, woody bracket fungus that grows on living trees, particularly oak species. In East and Central Texas, Fulvifomes johnsonianus has been found to commonly infect Quercus stellata, Quercus buckleyi, and other white oaks. The fungus produces conks that are 2-10 cm in diameter, with a fulvous to reddish-brown upper surface and a pale yellow to cream-colored pore surface. It is typically found on the trunks and branches of infected trees, often in association with other fungi and insects.
Polypore mushroom Fulvifomes johnsonianus (Phellinus johnsonianus)(?) on a cut surface of an oak fallen across the trail (it covers large area on the side of this tree) on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, November 16, 2019
Resupinate polypore mushroom Fulvifomes johnsonianus (Phellinus johnsonianus)(?) on a cut surface of an oak fallen across the trail on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, November 16, 2019
Edge of resupinate polypore mushroom Fulvifomes johnsonianus (Phellinus johnsonianus)(?) on a cut surface of an oak fallen across the trail on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, November 16, 2019
Resupinate polypore mushroom Fulvifomes johnsonianus (Phellinus johnsonianus)(?) covered by white powder of its spores on a side of a fallen oak on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, December 27, 2019
Resupinate polypore mushroom Fulvifomes johnsonianus (Phellinus johnsonianus)(?) with white spore powder on a side of a fallen oak on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, December 27, 2019
A slug on a resupinate polypore mushroom Fulvifomes johnsonianus (Phellinus johnsonianus)(?) covered by white powdery spores on a side of a fallen oak on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, December 27, 2019
Resupinate polypore mushroom Fulvifomes johnsonianus (Phellinus johnsonianus)(?) damaged by some brown fungus (undamaged left side was originally hidden under bark) on a side of a fallen oak on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, December 27, 2019
Resupinate polypore mushroom Fulvifomes johnsonianus (Phellinus johnsonianus)(?) with white powdery spores on a side of a fallen oak on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, December 27, 2019
A big oak fallen across the trail with resupinate polypore mushroom Fulvifomes johnsonianus (Phellinus johnsonianus)(?) covered by white spores on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, December 27, 2019
Close-up of resupinate polypore mushroom Fulvifomes johnsonianus (Phellinus johnsonianus)(?) on a cut surface of an oak fallen across the trail on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, December 27, 2019
Resupinate polypore mushroom Fulvifomes johnsonianus (Phellinus johnsonianus)(?) on a cut surface of an oak fallen across the trail on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, December 27, 2019
Polypore mushrooms Gelatoporia dichroa (Gloeoporus dichrous, Vitreoporus dichrous) over old crust fungus Fulvifomes johnsonianus (Phellinus johnsonianus)(?) on a fallen oak in area of Caney Creek crossing on Lone Star Hiking Trail in Sam Houston National Forest near Huntsville, Texas, February 9, 2020
Polypore mushrooms Gelatoporia dichroa (Gloeoporus dichrous, Vitreoporus dichrous) over old cracked crust fungus Fulvifomes johnsonianus (Phellinus johnsonianus)(?) on a fallen oak in area of Caney Creek crossing on Lone Star Hiking Trail in Sam Houston National Forest near Huntsville, Texas, February 9, 2020
Old cracked crust fungus Fulvifomes johnsonianus (Phellinus johnsonianus)(?) with algae on a fallen oak in area of Caney Creek crossing on Lone Star Hiking Trail in Sam Houston National Forest near Huntsville, Texas, February 9, 2020
Cracked surface of old fungus Fulvifomes johnsonianus (Phellinus johnsonianus)(?) on a fallen oak in area of Caney Creek crossing on Lone Star Hiking Trail in Sam Houston National Forest near Huntsville, Texas, February 9, 2020
Web-forming parasitic fungus Sporophagomyces chrysostomus(?) on resupinate polypore mushroom Fulvifomes johnsonianus (Phellinus johnsonianus)(?) on a large fallen oak on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, February 29, 2020
Feathery growth of parasitic fungus Sporophagomyces chrysostomus(?) on resupinate polypore mushroom Fulvifomes johnsonianus (Phellinus johnsonianus)(?) on a large oak fallen across the trail on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, February 29, 2020
Web-forming parasitic fungus Sporophagomyces chrysostomus(?) catching spores of resupinate polypore mushroom Fulvifomes johnsonianus (Phellinus johnsonianus)(?) on a large fallen oak on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, February 29, 2020
Parasitic fungus Sporophagomyces chrysostomus(?) on resupinate polypore mushroom Fulvifomes johnsonianus (Phellinus johnsonianus)(?) on a large oak fallen across the trail on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, February 29, 2020
Fan-like growth of parasitic fungus Sporophagomyces chrysostomus(?) on resupinate polypore mushroom Fulvifomes johnsonianus (Phellinus johnsonianus)(?) on a large oak fallen across the trail on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, February 29, 2020
Close-up of parasitic fungus Sporophagomyces chrysostomus(?) on resupinate polypore mushroom Fulvifomes johnsonianus (Phellinus johnsonianus)(?) on a large oak fallen across the trail on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, February 29, 2020
Web-like parasitic fungus Sporophagomyces chrysostomus(?) on resupinate polypore mushroom Fulvifomes johnsonianus (Phellinus johnsonianus)(?) on a large oak fallen across the trail on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, February 29, 2020
Orange parasitic fungus Sporophagomyces chrysostomus(?) on resupinate polypore mushroom Fulvifomes johnsonianus (Phellinus johnsonianus)(?) on a large oak fallen across the trail on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, February 29, 2020
Web-like growth of light brown parasitic fungus Sporophagomyces chrysostomus(?) on resupinate polypore mushroom Fulvifomes johnsonianus (Phellinus johnsonianus)(?) on a large oak fallen across the trail on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, February 29, 2020
Clumps of parasitic spore-catching fungus Sporophagomyces chrysostomus(?) under resupinate polypore mushroom Fulvifomes johnsonianus (Phellinus johnsonianus)(?) on a large oak fallen across the trail on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, February 29, 2020
Powdery white spores of resupinate polypore mushroom Fulvifomes johnsonianus (Phellinus johnsonianus)(?) and light brown parasitic fungus Sporophagomyces chrysostomus(?) on a large fallen oak on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, February 29, 2020
Growth of light brown parasitic fungus Sporophagomyces chrysostomus(?) under resupinate polypore mushroom Fulvifomes johnsonianus (Phellinus johnsonianus)(?) on a large fallen oak on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, February 29, 2020
Web-like growth of light brown parasitic fungus Sporophagomyces chrysostomus(?) under resupinate polypore mushroom Fulvifomes johnsonianus (Phellinus johnsonianus)(?) on a large fallen oak on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, February 29, 2020
Web-forming growth of light brown parasitic fungus Sporophagomyces chrysostomus(?) under resupinate polypore mushroom Fulvifomes johnsonianus (Phellinus johnsonianus)(?) on a large fallen oak on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, February 29, 2020
Clumpy growth of light brown parasitic fungus Sporophagomyces chrysostomus(?) under resupinate polypore mushroom Fulvifomes johnsonianus (Phellinus johnsonianus)(?) on a large fallen oak on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, February 29, 2020
Resupinate polypore mushroom Fulvifomes johnsonianus (Phellinus johnsonianus)(?) with patches of light brown parasitic fungus Sporophagomyces chrysostomus(?) on a large fallen oak on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, February 29, 2020
Close-up of fan-like growth of spore catching parasitic fungus Sporophagomyces chrysostomus(?) under resupinate polypore mushroom Fulvifomes johnsonianus (Phellinus johnsonianus)(?) on a large fallen oak on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, February 29, 2020
Fibrous surface of fan-like growth of spore catching parasitic fungus Sporophagomyces chrysostomus(?) under resupinate polypore mushroom Fulvifomes johnsonianus (Phellinus johnsonianus)(?) on a large fallen oak on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, February 29, 2020
Back lit fan-like growth of spore catching parasitic fungus Sporophagomyces chrysostomus(?) under resupinate polypore mushroom Fulvifomes johnsonianus (Phellinus johnsonianus)(?) on a large fallen oak on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, February 29, 2020
Growth of spore catching parasitic fungus Sporophagomyces chrysostomus(?) on pore surface of mushroom Fulvifomes johnsonianus (Phellinus johnsonianus)(?) on a large fallen oak on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, February 29, 2020
Web-like fans of spore catching parasitic fungus Sporophagomyces chrysostomus(?) under resupinate polypore mushroom Fulvifomes johnsonianus (Phellinus johnsonianus)(?) on a large fallen oak on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, February 29, 2020
Parasitic fungus Sporophagomyces chrysostomus(?) on resupinate polypore mushroom Fulvifomes johnsonianus (Phellinus johnsonianus)(?) on a large fallen oak on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, February 29, 2020
Resupinate polypore mushroom Fulvifomes johnsonianus (Phellinus johnsonianus)(?) on a large fallen oak that was cut when a large branch was detached from it on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, November 26, 2020
Resupinate polypore mushroom Fulvifomes johnsonianus (Phellinus johnsonianus)(?) on a large fallen oak on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, December 28, 2020
Growth of parasitic fungus Sporophagomyces chrysostomus(?) on resupinate polypore mushroom Fulvifomes johnsonianus (Phellinus johnsonianus)(?) on underside of a large oak log on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, January 17, 2021
Resupinate polypore mushroom Fulvifomes johnsonianus (Phellinus johnsonianus)(?) covering large area on a lower side of a large oak log on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, January 17, 2021
Parasitic fungus Sporophagomyces chrysostomus(?) on resupinate polypore mushroom Fulvifomes johnsonianus (Phellinus johnsonianus)(?) on underside of a large oak log on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, January 17, 2021
Crust-like parasitic fungus Sporophagomyces chrysostomus(?) on resupinate polypore mushroom Fulvifomes johnsonianus (Phellinus johnsonianus)(?) on underside of a large oak log on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, January 17, 2021
Details of parasitic fungus Sporophagomyces chrysostomus(?) on resupinate polypore mushroom Fulvifomes johnsonianus (Phellinus johnsonianus)(?) on underside of a large oak log on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, January 17, 2021
Close-up of parasitic fungus Sporophagomyces chrysostomus(?) on resupinate polypore mushroom Fulvifomes johnsonianus (Phellinus johnsonianus)(?) on underside of a large oak log on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, January 17, 2021
Orange spores on underside of parasitic fungus Sporophagomyces chrysostomus(?) on resupinate polypore mushroom Fulvifomes johnsonianus (Phellinus johnsonianus)(?) on a large oak log on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, January 17, 2021
Margin of parasitic fungus Sporophagomyces chrysostomus(?) on resupinate polypore mushroom Fulvifomes johnsonianus (Phellinus johnsonianus)(?) on a large oak log on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, January 17, 2021
Texture of parasitic fungus Sporophagomyces chrysostomus(?) on resupinate polypore mushroom Fulvifomes johnsonianus (Phellinus johnsonianus)(?) on a large oak log on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, January 17, 2021
Large resupinate polypore mushroom Fulvifomes johnsonianus on a large fallen oak with white spores in Little Thicket Nature Sanctuary near Cleveland. Texas, February 24, 2024
Large resupinate polypore mushroom Fulvifomes johnsonianus on a large fallen oak with Sporophagomyces chrysostomus(?) in Little Thicket Nature Sanctuary near Cleveland. Texas, February 24, 2024Observations were made of the resupinate polypore mushroom Fulvifomes johnsonianus and the parasitic fungus Sporophagomyces chrysostomus on fallen oak logs in Texas. The mushroom was found on multiple occasions in Sam Houston National Forest from 2020 to 2021, and again in Little Thicket Nature Sanctuary in 2024. The parasitic fungus was often present on the mushroom, with varying appearances, including crust-like and orange-spored forms. The observations were made at different times of the year, suggesting a persistent relationship between the two organisms. The detailed descriptions and photographs provide a comprehensive record of the interaction between Fulvifomes johnsonianus and Sporophagomyces chrysostomus in their natural habitat. Overall, the observations contribute to a better understanding of the ecology and behavior of these fungi.
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