Okla. Stat. tit. 2, § 16-69
The redbud tree shall be adopted and the same be made the official tree of this state.
Laws 1971, SB 143, c. 349, § 313, emerg. eff. June 24, 1971; Renumbered from 2 O.S. § 1301-313 by Laws 2001, SB 522, c. 113, § 56, emerg. eff. April 18, 2001.