A common flower that symbolizes friendship is the beautiful yellow rose. This flower was chosen as the national symbol of Friendship Day. Giving a bouquet of yellow roses to someone means that you wish them great joy and that they are a good friend.
Some other flowers that are considered to be symbols of friendship are the iris, chrysanthemum and ivy. The best flower to be sent as the symbol of friendship, though, would be picking your friend’s favorite flower to send to them. This shows that you care enough to pay attention to their likes and dislikes, and love them enough to send their favorite flower to them.