Interesting tiara

Jan Yager's “Tiara of Useful Knowledge

 City Flora: The Philadelphia Series (2006)” and is made of oxidized sterling silver, 18K and 14K gold. Each piece of the tiara transforms, coming off to become a separate entity --- brooch, tie tac, pendants... and each represents a specific plant as well: (Left to Right, Back to Front) Common Ragweed, Sweet Clover, Lamb's Quarters, Plantain, Switch Grass, Potato, Rye, Prickly Lettuce, Crab Grass, Ant, Tobacco, Pebble. 

source: CHUCHU NY