The meaning of Tulips:
 yellow tulips symbolizing cheerful thoughts, white conveying forgiveness and purple representing royalty - a Turkish legend may be responsible for the red tulip's symbolism. The story goes that a prince named Farhad was love struck by a maiden named Shirin.  When Farhad learned that Shirin had been killed, he was so overcome with grief that he killed himself - riding his horse over the edge of a cliff.  It's said that a scarlet tulip sprang up from each droplet of his blood, giving the red tulip the meaning "perfect love." 

Ah, I love the idea of the language of flowers (just read a book titled that ftw). This is really nice and a lot of fun, actually. It's crazy to think of how many meanings of flowers there are (for example, the yellow rose also represents jealousy). Do you know the meaning of the birth month flowers?

And @Selene: thank you for providing the information on tulips! I really love tulips ^^

I love sunflowers.  Do they mean anything?

I'm sure sunflowers have multiple meanings ^^ this website here, [Only admins are allowed to see this link] lists that sunflowers mean:

Quote :

Sunflower signifies pure thoughts. It symbolizes adoration and dedication. It is symbolic of dedicated love. It is however also symbolic of haughtiness.

Pure thoughts and dedicated love sounds wonderful.

Did not know what haughtiness meant.  Never heard of that word before so I  looked it up.

It has two meanings:  
1.disdainfully proud; snobbish; scornfully arrogant
2.lofty or noble