Fairhope Graphics, in nearby Chester County PA, creates beautiful paper goods, featuring their own watercolor images as well as the work of 19th century naturalists. Each card includes a brief description on the back about the type of species illustrated.
 
Folded card with envelope, both in 100% recycled paper, 4.25 x 5.5". Blank inside for your message. Packaged in a clear sleeve. Made in the USA.