Overview
InfestedTree01 is a Valheim world location that spawns in the swamp biome, identified internally as InfestedTree01. World generation places up to 700 per world, with terrain constraints (min altitude -1), and an exclusion radius of 5m, which is why some seeds have far more of them than others. The data tags it as randomly damaged and vegetation allowed.
About
InfestedTree01 is an Ancient tree infested with Gucksacks in the Swamp. Destroying the sacks yields Guck, used in late-game Mountain-era crafts.