It is very common to give flowers to our loved ones and more on certain specific dates. That's why it's not uncommon to see flowers, a bride, a mother and even a deceased. Apparently this practice of giving flowers has been taking place for several centuries. But it was in the Victorian era, when a flowering messaging system emerged.
For some, it is difficult to express their feelings to a person, but at that time it could even be offensive to say some things. A brief example we have it with the word leg, the educated people of those times considered it a rudeness and for some even the word pants was offensive, so they better called it "The need of the South". Therefore, if they did not have a correct word to express their feelings, it was best to use flowers.
With time Floriography arose, or as some say, the language of flowers and with each flower was said something different. Some examples are the red tulip which means: "I love you", with the forget-me-not flower you mean: "True love" and the cactus flower means: "I really love you".
Some flowers were to show love and others to show other feelings. As a sample we have the Jacinto which means: "I'm sorry, you can forgive me", the Yellow Lily with which you say: "I hate you" and a yellow Carnation can represent "contempt".
And what about the rose? Well, that depends on the color and its state, a bright red can mean "love for life" and a withered white rose can be understood as: "I'd rather be dead than be with you" ... So, if you gave or received a flower, we hope it was the right one, that the other person is the appropriate one and that both of you know how to "read" floriography.