North Dakota (ND) Nickname: Peace Garden State Capital: Bismarck Motto: Liberty and union, now and forever, one and inseparable. Flower: Wild prairie rose Bird: Western Meadowlark Tree: American elm Song: North Dakota Hymn Entered Union: November 2, 1889 Rank: 39 The 50 State Quarters Program Release Date: August 28, 2006 Official Website of North Dakota