These are two postcards in Cartwheel Company's Stamp Collector Series™. These cards reproduce two of the stamps from the 1992 Wildflowers Issue, the Harlequin Lupine and Shooting Star. Here is the description of the Wildflowers Issue from Arago: People, Postage & The Post, an educational website about United States stamps:
Fifty colorful, blooming native plants dotted the philatelic landscape with the 29-cent Wildflowers commemorative stamps issued July 24, 1992, in Columbus, Ohio, host city for the AmeriFlora '92 International Floral and Garden Exposition. Each of the fifty states can claim one or more of the lovely wildflowers represented on the stamps.All fifty of the wildflowers stamps are pictured on the Arago website.
The stamps were issued in panes of fifty different designs. The selvage of each pane includes a promotional message for a special Wildflower album, featuring fifty mint stamps and sixty-four pages of informative text and colorful artwork. Designed by Karen Mallary of Anacortes, Washington, the stamps were produced by Ashton-Potter America, Inc., in the offset lithography process.
I have a couple of other wildflowers postcards from this series. I don't know if all of stamps from the Wildflowers Issue were reproduced on postcards. This postcard series would have benefited from better art directing and editing. Even "wildflowers" is misspelled on the front of the card as two words, and the description on the back doesn't make sense.
I am participating in Sunday Stamps at Viridian's Postcard Blog