Synonyms: Byssomerulius ambiguus, Coriolus ambiguus, Meruliopsis ambigua, Meruliopsis ambiguus, Merulius ambiguus, Sesia ambigua.
Gloeoporus ambiguus is a crust fungus that grows on dead wood, particularly deciduous trees. In East and Central Texas, it typically fruits in the spring and fall, producing resupinate to effused-reflexed basidiocarps with a smooth, creamy to yellowish-brown hymenium. The pore surface is often wrinkled or veined, and the context is thin and pale. It can be found on a variety of substrates, including oak, elm, and willow, in wooded areas and along streams. Microscopic characteristics include cylindrical to subcylindrical spores measuring 4-6 µm in length.
Jelly rot fungus Gloeoporus ambiguus (Meruliopsis ambigua) on a fallen pine branch on Sand Branch Loop Trail in Sam Houston National Forest near Montgomery. Texas, January 1, 2021
Little Lake Creek Loop Trail, Montgomery, TX 77356, USA
Emerging crust fungus Gloeoporus ambiguus (Meruliopsis ambigua) on a fallen pine branch on Sand Branch Loop Trail in Sam Houston National Forest near Montgomery. Texas, January 1, 2021Little Lake Creek Loop Trail, Montgomery, TX 77356, USA
Caps of corticioid fungus (Gloeoporus ambiguus (Meruliopsis ambigua) on a fallen pine branch on Sand Branch Loop Trail in Sam Houston National Forest near Montgomery. Texas, January 1, 2021Little Lake Creek Loop Trail, Montgomery, TX 77356, USA
Texture of jelly rot fungus Gloeoporus ambiguus (Meruliopsis ambigua) on a fallen pine branch on Sand Branch Loop Trail in Sam Houston National Forest near Montgomery. Texas, January 1, 2021Little Lake Creek Loop Trail, Montgomery, TX 77356, USA
Corticioid fungus Gloeoporus ambiguus (Meruliopsis ambigua) on bark of a fallen pine branch near Pole Creek on North Wilderness Trail of Little Lake Creek Wilderness in Sam Houston National Forest north from Montgomery. Texas, January 13, 2021Lone Star Hiking Trail, Montgomery, TX 77356, USA
Texture of corticioid fungus Gloeoporus ambiguus (Meruliopsis ambigua) on a fallen pine branch near Pole Creek on North Wilderness Trail of Little Lake Creek Wilderness in Sam Houston National Forest north from Montgomery. Texas, January 13, 2021Lone Star Hiking Trail, Montgomery, TX 77356, USA
Close-up of corticioid fungus Gloeoporus ambiguus (Meruliopsis ambigua) on a fallen pine branch near Pole Creek on North Wilderness Trail of Little Lake Creek Wilderness in Sam Houston National Forest north from Montgomery. Texas, January 13, 2021Lone Star Hiking Trail, Montgomery, TX 77356, USA
Margin areas of corticioid fungus Gloeoporus ambiguus (Meruliopsis ambigua) on a fallen pine branch near Pole Creek on North Wilderness Trail of Little Lake Creek Wilderness in Sam Houston National Forest north from Montgomery. Texas, January 13, 2021Lone Star Hiking Trail, Montgomery, TX 77356, USA
Corticioid (crust) fungus Gloeoporus ambiguus (Meruliopsis ambigua) on a fallen pine twig on Richards Loop Trail in Sam Houston National Forest. Texas, October 2, 2021Little Lake Creek Loop Trail, Montgomery, TX 77356, USA
Corticioid (crust) fungus Gloeoporus ambiguus (Meruliopsis ambigua) on underside of a fallen pine twig on Richards Loop Trail in Sam Houston National Forest. Texas, October 2, 2021Little Lake Creek Loop Trail, Montgomery County, Texas, 77873, United States
Close-up of corticioid fungus Gloeoporus ambiguus (Meruliopsis ambigua) on a fallen pine twig on Richards Loop Trail in Sam Houston National Forest. Texas, October 2, 2021Little Lake Creek Loop Trail, Montgomery, TX 77356, USA
Wavering margin of corticioid fungus Gloeoporus ambiguus (Meruliopsis ambigua) on a fallen pine twig on Richards Loop Trail in Sam Houston National Forest. Texas, October 2, 2021Little Lake Creek Loop Trail, Montgomery, TX 77356, USA
Surface of corticioid fungus Gloeoporus ambiguus (Meruliopsis ambigua) on a fallen pine twig on Richards Loop Trail in Sam Houston National Forest. Texas, October 2, 2021Little Lake Creek Loop Trail, Montgomery County, Texas, 77873, United States
Texture of corticioid fungus Gloeoporus ambiguus (Meruliopsis ambigua) on a fallen pine twig on Richards Loop Trail in Sam Houston National Forest. Texas, October 2, 2021Little Lake Creek Loop Trail, Montgomery County, Texas, 77873, United States
Close-up of corticioid fungus Gloeoporus ambiguus (Meruliopsis ambigua) in fresh form on a fallen pine branch near Pole Creek on North Wilderness Trail of Little Lake Creek Wilderness in Sam Houston National Forest north from Montgomery. Texas, August 20, 2022Lone Star Hiking Trail, Montgomery County, Texas, United States
Corticioid fungus Gloeoporus ambiguus (Meruliopsis ambigua) in fresh form on a fallen pine branch near Pole Creek on North Wilderness Trail of Little Lake Creek Wilderness in Sam Houston National Forest north from Montgomery. Texas, August 20, 2022Lone Star Hiking Trail, Montgomery County, Texas, United States
Fresh growth of corticioid fungus Gloeoporus ambiguus (Meruliopsis ambigua) in fresh form on a fallen pine branch near Pole Creek on North Wilderness Trail of Little Lake Creek Wilderness in Sam Houston National Forest north from Montgomery. Texas, August 20, 2022Lone Star Hiking Trail, Montgomery County, Texas, United States
Merulioid fungus Gloeoporus ambiguus (Meruliopsis ambigua) in fresh form on a fallen pine branch near Pole Creek on North Wilderness Trail of Little Lake Creek Wilderness in Sam Houston National Forest north from Montgomery. Texas, August 20, 2022Lone Star Hiking Trail, Montgomery County, Texas, United States
Tissues of crust fungus Gloeoporus ambiguus (Meruliopsis ambigua) from a fallen pine branch under a microscope at low magnification, collected near Pole Creek in Sam Houston National Forest north from Montgomery. Texas, August 20, 2022
Basidioles(?) of crust crust fungus Gloeoporus ambiguus (Meruliopsis ambigua) from a fallen pine branch under a microscope, collected near Pole Creek in Sam Houston National Forest north from Montgomery. Texas, August 20, 2022
Mycelium hyphae of corticioid fungus Gloeoporus ambiguus (Meruliopsis ambigua) from a fallen pine branch under a microscope, collected near Pole Creek in Sam Houston National Forest north from Montgomery. Texas, August 20, 2022
Spores of corticioid fungus Gloeoporus ambiguus (Meruliopsis ambigua) from a fallen pine branch collected near Pole Creek in Sam Houston National Forest north from Montgomery a day before. Texas, August 21, 2022
Merulioid mushroom Gloeoporus ambiguus (Meruliopsis ambigua) on a fallen pine branch near Pole Creek on North Wilderness Trail of Little Lake Creek Wilderness in Sam Houston National Forest north from Montgomery. Texas, August 31, 2022Lone Star Hiking Trail, Montgomery County, Texas, United States
Wrinkled crust fungus Gloeoporus ambiguus (Meruliopsis ambigua) on a fallen pine branch near Pole Creek on North Wilderness Trail of Little Lake Creek Wilderness in Sam Houston National Forest north from Montgomery. Texas, August 31, 2022Lone Star Hiking Trail, Montgomery County, Texas, United States
Wrinkled surface of crust fungus Gloeoporus ambiguus (Meruliopsis ambigua) on a fallen pine branch near Pole Creek on North Wilderness Trail of Little Lake Creek Wilderness in Sam Houston National Forest north from Montgomery. Texas, August 31, 2022Lone Star Hiking Trail, Montgomery County, Texas, United States
Margin of wrinkled crust fungus Gloeoporus ambiguus (Meruliopsis ambigua) on a fallen pine branch near Pole Creek on North Wilderness Trail of Little Lake Creek Wilderness in Sam Houston National Forest north from Montgomery. Texas, August 31, 2022Lone Star Hiking Trail, Montgomery County, Texas, United States
Growth of wrinkled crust fungus Gloeoporus ambiguus (Meruliopsis ambigua) on a fallen pine branch near Pole Creek on North Wilderness Trail of Little Lake Creek Wilderness in Sam Houston National Forest north from Montgomery. Texas, August 31, 2022Lone Star Hiking Trail, Montgomery County, Texas, United States
Wrinkled crust fungus Gloeoporus ambiguus (Meruliopsis ambigua) on a fallen pine branch after several rainy days near Pole Creek on North Wilderness Trail of Little Lake Creek Wilderness in Sam Houston National Forest north from Montgomery. Texas, August 31, 2022Lone Star Hiking Trail, Montgomery County, Texas, United States
Corticioid fungus Gloeoporus ambiguus (Meruliopsis ambigua) on a fallen pine branch near Pole Creek on North Wilderness Trail of Little Lake Creek Wilderness in Sam Houston National Forest north from Montgomery. Texas, August 31, 2022Lone Star Hiking Trail, Montgomery County, Texas, United States
Spores of wrinkled crust corticioid fungus Gloeoporus ambiguus (Meruliopsis ambigua) from a fallen pine branch collected in Sam Houston National forest a day before. Texas, September 1, 2022
Spores under a microscope of wrinkled crust corticioid fungus Gloeoporus ambiguus (Meruliopsis ambigua) from a fallen pine branch collected in Sam Houston National forest a day before. Texas, September 1, 2022
Spore size 4.6 - 5.4 × 2.2 - 2.56 µm, length to width ratio Q = 1.9 - 2.3.
Corticioid fungus Gloeoporus ambiguus (Meruliopsis ambigua) on a fallen pine branch on Lone Star Hiking Trail near Pole Creek in Sam Houston National Forest. Richards, Texas, September 3, 2022Pole Creek Trail, Montgomery County, Texas, United States
Concentric pattern of wrinkled crust corticioid fungus Gloeoporus ambiguus (Meruliopsis ambigua) on a fallen pine branch on Lone Star Hiking Trail near Pole Creek in Sam Houston National Forest. Richards, Texas, September 3, 2022Pole Creek Trail, Montgomery County, Texas, United States
Texture of wrinkled crust fungus Gloeoporus ambiguus (Meruliopsis ambigua) on a fallen pine branch on Lone Star Hiking Trail near Pole Creek in Sam Houston National Forest. Richards, Texas, September 3, 2022Pole Creek Trail, Montgomery County, Texas, United States
Wrinkled crust corticioid fungus Gloeoporus ambiguus (Meruliopsis ambigua) on thin bark of a fallen pine branch on Lone Star Hiking Trail near Pole Creek in Sam Houston National Forest. Richards, Texas, September 3, 2022Pole Creek Trail, Montgomery County, Texas, United States
Crust fungus Gloeoporus ambiguus (Meruliopsis ambigua) together with plasmodium of slime mold on a fallen pine branch on Lone Star Hiking Trail near Pole Creek in Sam Houston National Forest. Richards, Texas, September 3, 2022Pole Creek Trail, Montgomery County, Texas, United States
Corticioid (crust) fungus Gloeoporus ambiguus (Meruliopsis ambigua)(?) on pine or may be a hardwood twig on Sand Branch Loop Trail in Sam Houston National Forest near Montgomery. Texas, December 22, 2023Little Lake Creek Loop Trail, Montgomery County, Texas, 77873, United States
Close-up of corticioid fungus Gloeoporus ambiguus (Meruliopsis ambigua)(?) on pine or may be a hardwood twig on Sand Branch Loop Trail in Sam Houston National Forest near Montgomery. Texas, December 22, 2023Little Lake Creek Loop Trail, Montgomery County, Texas, 77873, United States
Spores of corticioid fungus Gloeoporus ambiguus (Meruliopsis ambigua)(?) collected 2 days before on Sand Branch Loop Trail in Sam Houston National Forest near Montgomery. Texas, December 24, 2023Spore size 5.4 - 6.2 × 2.53 - 3 µm, length to width ratio Q = 2 - 2.1.
Jelly rot fungus Gloeoporus ambiguus (Meruliopsis ambigua) on a fallen pine branch on Richards Loop Trail in Sam Houston National Forest. Texas, January 27, 2024Little Lake Creek Loop Trail, Montgomery County, Texas, 77873, United States
Texture of jelly rot fungus Gloeoporus ambiguus (Meruliopsis ambigua) on a fallen pine branch on Richards Loop Trail in Sam Houston National Forest. Texas, January 27, 2024Little Lake Creek Loop Trail, Montgomery County, Texas, 77873, United States
Spores of jelly rot fungus Gloeoporus ambiguus (Meruliopsis ambigua) from a fallen thin pine twig, collected a day before on Richards Loop Trail in Sam Houston National Forest. Texas, January 28, 2024
Spores of jelly rot fungus Gloeoporus ambiguus (Meruliopsis ambigua) from a fallen thicker pine twig, collected a day before on Richards Loop Trail in Sam Houston National Forest. Texas, January 28, 2024The observations document the presence of Gloeoporus ambiguus (Meruliopsis ambigua), a corticioid fungus, on fallen pine branches in Sam Houston National Forest, Texas. The fungus was observed over several years, from 2022 to 2024, with varying appearances, including wrinkled crust, jelly rot, and concentric patterns. It was found on different trails, including Lone Star Hiking Trail, Richards Loop Trail, and Sand Branch Loop Trail. The fungus was often associated with thin bark or decaying wood. Spores were collected and examined under a microscope. The observations suggest that G. ambiguus is a common species in the forest, with varying growth patterns and appearances depending on environmental conditions. The documentation provides valuable information on the ecology and morphology of this fungal species. Overall, the observations highlight the diversity of fungi in the forest ecosystem.
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