When looking through the 45 "Zinnia" images at Acclaim Images.com this Zinnia's Flower Photo in Black & White 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:
Zinnia's Flower Photo in Black & White
Zinnia's Flower Photo in Black & White

Some related terms for more images:
plants,  petals,  black white,  garden,  flowers,  floral,  zinnia,  florist,  zinnias,  verna bice,