1896 25 96 Not only do we get the cross as nature-symbol, but we find it associated with especial colours.
1927 H. Crane 12 Sept. (1965) 305 Pocahontas is the mythological nature-symbol chosen to represent the physical body of the continent.
2001 (Nexis) 22 May (Technology section) 6 Ukranian [sic] Easter Eggs..are typically decorated with nature symbols..to ensure that goodness prevails over evil.