A yellow jelly fungus. I found it on a fallen log, and it was growing right next to some turkey tail mushrooms. The texture is like rubber and it is very bright.
Looks sort of like a piece of sulfur.
Here's Tremella mesenterica or Witch's Butter, glowing in the sunshine on a fallen branch.
Tremella mesenterica (common names include yellow brain, golden jelly fungus, yellow trembler, and witches' butter) is a common jelly fungus in the Tremellaceae family of the Agaricomycotina. It is most frequently found on dead but attached and on recently fallen branches, especially of angiosperms, as a parasite of wood decay fungi in the genus Peniophora. The gelatinous, orange-yellow fruit body of the fungus, which can grow up to 7.5 cm (3.0 in) diameter, has a convoluted or lobed...