Disclaimer: These are just from the internet, I'm in no way a flower expert.

Carnations: They symbolise pride and beauty.

Different colour carnations mean different things.

Red: Love, Pride and Admiration

Pink: The love of a mother or woman

Purple: Capriciousness

Yellow: Disdain, Rejection or Dissapointment

White: Innocence and Pure love

Striped: Refusal

Knowing the meanings of flowers can be quite useful so that you don't give someone who's a friend a flower seen as romantic or a flower known for hatred to someone who's company you really enjoy.