Synonyms: Auricularia ferruginea, Helvella rubiginosa, Hymenochaete ferruginea, Stereum ferrugineum, Stereum rubiginosum, Thelephora ferruginea, Thelephora rubiginosa.
Common name: oak curtain crust.
Hymenochaete rubiginosa is a crustose fungus that grows on dead wood, particularly on deciduous trees such as oak and elm. In East and Central Texas, it typically forms reddish-brown to orange-brown crusts with a velvety texture, often with wavy or wrinkled margins. The fungus produces setae, which are hair-like structures, and its spores are brown and cylindrical in shape. It can be found on logs, stumps, and fallen branches, especially in moist, shaded areas.
Oak curtain crust fungus (Hymenochaete rubiginosa) on an oak log in Lick Creek Park. College Station, Texas, December 13, 2019
Caps of oak curtain crust fungus (Hymenochaete rubiginosa) on a log in Lick Creek Park. College Station, Texas, December 13, 2019
Close up of oak curtain crust fungus (Hymenochaete rubiginosa) on a log in Lick Creek Park. College Station, Texas, December 13, 2019
Oak curtain crust fungus (Hymenochaete rubiginosa) on a log on Kirby Trail in Big Thicket National Preserve. Warren, Texas, October 17, 2020
Oak curtain crust fungus (Hymenochaete rubiginosa) with its underside on Kirby Trail in Big Thicket National Preserve. Warren, Texas, October 17, 2020
Oak curtain crust fungus (Hymenochaete rubiginosa) together with ceramic parchment (Xylobolus frustulatus) on Kirby Trail in Big Thicket National Preserve. Warren, Texas, October 17, 2020
Side view of oak curtain crust fungus (Hymenochaete rubiginosa) on a log on Kirby Trail in Big Thicket National Preserve. Warren, Texas, October 17, 2020
Oak curtain crust mushrooms (Hymenochaete rubiginosa) on an oak log on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, December 28, 2020
Oak curtain crust fungus (Hymenochaete rubiginosa(?)) on a fallen oak branch in Lick Creek Park. College Station, Texas, February 10, 2021
Crust fungus Hymenochaete rubiginosa(?) on a fallen oak branch in Lick Creek Park. College Station, Texas, February 10, 2021
Pattern of oak curtain crust fungus (Hymenochaete rubiginosa(?)) on a fallen oak branch in Lick Creek Park. College Station, Texas, February 10, 2021
Resupinate form of oak curtain crust fungus (Hymenochaete rubiginosa) on Richards Loop Trail in Sam Houston National Forest. Texas, October 2, 2021
Oak curtain crust fungus (Hymenochaete rubiginosa) covering fallen oak branches on Richards Loop Trail in Sam Houston National Forest. Texas, October 2, 2021
Oak curtain crust fungus (Hymenochaete rubiginosa) on a fallen oak branch on Richards Loop Trail in Sam Houston National Forest. Texas, October 2, 2021
Close-up of oak curtain crust fungus (Hymenochaete rubiginosa) on Richards Loop Trail in Sam Houston National Forest. Texas, October 2, 2021
Oak curtain crust fungus (Hymenochaete rubiginosa) on a fallen oak on Richards Loop Trail in Sam Houston National Forest. Texas, October 2, 2021
Caps of oak curtain crust fungus (Hymenochaete rubiginosa) on a fallen oak twig and a branch on Richards Loop Trail in Sam Houston National Forest. Texas, October 2, 2021
Oak Curtain Crust fungus (Hymenochaete rubiginosa) on a fallen juniper (spore print white) at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, January 1, 2023
Underside of Oak Curtain Crust fungus (Hymenochaete rubiginosa) on a fallen juniper at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, January 1, 2023
Caps of Oak Curtain Crust fungus (Hymenochaete rubiginosa) on a fallen juniper at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, January 1, 2023
Oak curtain crust fungus (Hymenochaete rubiginosa)(?) (spore print white or light brown), near Pole Creek on North Wilderness Trail of Little Lake Creek Wilderness in Sam Houston National Forest north from Montgomery. Texas, February 6, 2023
Texture of oak curtain crust fungus (Hymenochaete rubiginosa)(?) near Pole Creek on North Wilderness Trail of Little Lake Creek Wilderness in Sam Houston National Forest north from Montgomery. Texas, February 6, 2023
Close-up of oak curtain crust fungus (Hymenochaete rubiginosa)(?) near Pole Creek on North Wilderness Trail of Little Lake Creek Wilderness in Sam Houston National Forest north from Montgomery. Texas, February 6, 2023
Spores (in lugol) of oak curtain crust fungus (Hymenochaete rubiginosa)(?) collected two days before near Pole Creek on North Wilderness Trail of Little Lake Creek Wilderness in Sam Houston National Forest north from Montgomery. Texas, February 8, 2023
Spores (in Melzer) of oak curtain crust fungus (Hymenochaete rubiginosa)(?) collected two days before near Pole Creek on North Wilderness Trail of Little Lake Creek Wilderness in Sam Houston National Forest north from Montgomery. Texas, February 8, 2023The fungus Hymenochaete rubiginosa was observed in East and Central Texas across multiple locations, including Lick Creek Park, Big Thicket National Preserve, Sam Houston National Forest, and Lake Somerville Trailway. The observations span from December 2019 to February 2023. The fungus was typically found on oak logs or fallen branches, but also on a juniper branch in one instance. Various forms of the fungus were documented, including caps, underside, and resupinate form. Some observations included notes on spore prints, which were white or light brown. The majority of the observations were confirmed as Hymenochaete rubiginosa, while a few were marked as uncertain with a question mark. Overall, the observations suggest that Hymenochaete rubiginosa is widespread in East and Central Texas, particularly in areas with oak trees.
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