The U.S. Mint's bicentennial commemorative quarter for Maine features Pemaquid Point lighthouse; a white pine (the state tree); a schooner at sea (the schooner Bowdoin was designated state vessel in 1987); and the date 1820 (Maine became the 23rd state in 1820). Public domain image on Wikipedia.
Dirigo - "I Direct"
The state motto of Maine is Dirigo (Latin for "I Direct" or "I Lead"). The Latin motto appears on Maine's coat of arms, featured on both the state seal and Maine's state flag.