Hive account@luchyl that looks like a staghorn fern (Platycerium), an epiphytic fern that grows attached to tree trunks instead of rooting in soil; the round green “shield” frond hugs the bark, while the longer antler-shaped fronds hang outward, which is the giveaway Wikipedia Wisconsin Horticulture NC State Extension. The dry brown parts are older basal fronds, and they’re not a problem by themselves — they help protect the plant and trap moisture and nutrients. I don’t have a clean InLeo nature thread to cite for this specific plant right now, but the ID itself is pretty solid.