This will not explain the use and the meaning of roses in the Rose of Versailles, however there are some meanings to ponder upon. If you decide to send someone a rose, read this before!

Their meaning...
 
 

It is common knowledge that red roses mean I love you. 

Red and white together mean unity, 

Pink means grace and gentility

Yellow symbolizes joy. 

Send orange or coral roses to speak your desire. 

Burgundy will compliment your sweetheart's unconscious beauty. 

Sweetheart roses mean darling, dear, or honey. 

A single rose signifies simplicity. 

Careful!! Don't confuse white roses with white rosebuds; the first means you're heavenly, while the second warns that you're too young for love.

Their origin...

The ancients explained the beauty of the rose through myths of godly creation. 
 
 

The Greek goddess Chloris stumbled upon a beautiful dead nymph and turned her into a flower; Aphrodite added beauty; the three graces added brilliance, joy, and charm. Dionysious donated fragrant nectar, while Zephyrus the west wind blew away the clouds so Apollo could shower the rose in sun. The flower was then given to Eros, the deity of love, and named the "Queen of Flowers." 

The Romans had their own ideas on the rose's origin. According to their legend, many suitors were lined up to marry a beautiful woman named Rodanthe, but she had little interest in any of them. These men were so full of love and desire that they became rowdy and eventually broke down the doors to her house. This episode angered the goddess Diana, who turned the woman into a flower and her suitors into thorns to teach them a lesson.