When looking through the 463 "Poppy" images at Acclaim Images.com this Bright Red Poppies in a Farmer's Field - Digital Watercolor Impression was a favorite.
All of their pictures are hand picked, availiable in a number of formats, and you can even get custom prints and posters.

Description:
Bright Red Poppies in a Farmer's Field - Digital Watercolor Impression
Stock image of a field of red poppies - a digital watercolor impression. This would make an attractive greetings card.

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