Indiana Code: IC 1-2-7
Chapter 7. State Flower and Tree
IC 1-2-7-1Sec. 1. The tulip tree (liriodendron tulipifera) is hereby adopted and designated as the official state tree, and the flower of the peony (Paeonie) is hereby adopted and designated as the official state flower of the state of Indiana.
(Formerly: Acts 1931, c.48, s.1; Acts 1957, c.283, s.1.)
The tulip tree (Liriodendron Tulipifera), known also as yellow poplar, was adopted by the 1931 General Assembly (Indiana Code 1-2-7). It attains great height and can be found throughout the state. The leaf is distinctive (it appears in the border of the state seal), and the lovely bell-shaped greenish-yellow flowers appear in May or June. The soft white wood has many uses.
Drawing by Mike Sherer
The peony (Paeonia) was adopted as the state flower by the 1957 General Assembly (Indiana Code 1-2-7). From 1931 to 1957 the zinnia was the state flower. The peony blooms the last of May and early June in various shades of red and pink and also in white; it occurs in single and double forms. No particular variety or color was designated by the General Assembly. It is cultivated widely throughout the state and is extremely popular for decorating gravesites for Memorial Day.
Drawing by Mike Sherer