Wildflowers of The USA on Stamps – 1992.
The United States issued a set of 50 stamps on Wildflowers on 24 Jul 1992. A few of them are listed. All Stamps are of 29 cents denomination.
Dutchman’s Breeches Jacob’s Ladder Plains Prickly Pear
Mexican Hat Harebell Smooth Solomon’s Seal Standing Cypress
Stamp Digest 