Do roses come in blue or green?

There is only one species of rose that produces green blossoms. Although it's common name is simply "The Green Rose", it's Latin name is Rosa chinensis 'Viridiflora'.

The plant's flowers do not resemble traditional rose blossoms and they produce an unusual, peppery scent. It is this reason that the species is considered to be a very old variety, perhaps one of the very first varieties of roses.