Common names: witches' butter, Black Jelly Roll, Black Witches' Butter.
Extract from Wikipedia article: Exidia glandulosa (common names black witches' butter, black jelly roll, or warty jelly fungus) is a jelly fungus in the family Auriculariaceae. It is a common, wood-rotting species in Europe, typically growing on dead attached branches of oak. The fruit bodies are up to 3 cm (1.2 in) wide, shiny, black and blister-like, and grow singly or in clusters. Its occurrence elsewhere is uncertain because of confusion with the related species, Exidia nigricans.
Jelly fungus Exidia glandulosa(?) on Kiwanis Nature Trail. College Station, Texas, March 1, 2018 1101 Williams Creek Dr, College Station, TX 77840, USA
Black jelly roll fungus (Exidia glandulosa) on a fallen elm(?) on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, January 12, 2020 Little Lake Creek Loop Trail, Montgomery, TX 77356, USA
Black witches' butter fungus (Exidia glandulosa) on a fallen elm(?) on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, January 12, 2020 Little Lake Creek Loop Trail, Montgomery, TX 77356, USA
Warty fungus black jelly roll (Exidia glandulosa) on a fallen elm(?) on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, January 12, 2020 Little Lake Creek Loop Trail, Montgomery, TX 77356, USA
Texture of black jelly roll fungus (Exidia glandulosa) on a fallen elm(?) on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, January 12, 2020 Little Lake Creek Loop Trail, Montgomery, TX 77356, USA
Close-up of black jelly roll fungus (Exidia glandulosa) on a fallen elm(?) on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, January 12, 2020 Little Lake Creek Loop Trail, Montgomery, TX 77356, USA
Cut and overturned piece of witches' butter fungus (Exidia glandulosa) on a fallen elm(?) on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, January 12, 2020 Little Lake Creek Loop Trail, Montgomery, TX 77356, USA
Warty texture of witches' butter fungus (Exidia glandulosa) on a fallen elm(?) on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, January 12, 2020 Little Lake Creek Loop Trail, Montgomery, TX 77356, USA