Main Content Act 7 of 1955 friendly link Printer Friendly bills affecting index and updates Search within this Statute for STATE TREEAct 7 of 1955AN ACT to adopt the white pine (Pinus strobus, L.) as the official state tree for the state of Michigan. History: 1955, Act 7, Eff. Oct. 14, 1955 © 2009 Legislative Council, State of MichiganThe People of the State of Michigan enact: DocumentTypeDescription Section 2.31SectionState tree.