From the Super Mario Wiki, the Mario encyclopedia
Ol' Grandsappy is an old tree in Paper Mario: The Origami King. Mario and Olivia encounter him in Whispering Woods when they sit on a tree stump, which is actually Ol' Grandsappy. The Sap Sisters tell Mario that he is very sick because some Toads chopped him down. Mario then has to find a Soul Seed to help revive him. After Mario obtains the Soul Seed, he finds that Ol' Grandsappy has been ambushed and eaten up by some Paper Macho Goombas. Mario uses confetti on him to bring him back to life and gives him the Soul Seed, which makes him sing a song and grow into Sweet Sap Loggins, a large tree and a younger version of himself. In the end credits, some Toads are found decorating Sweet Sap Loggins with flower wreaths.
Collectible Treasure descriptions
Names in other languages
Sweet Sap Loggins