The 'totem/symbolism' of the sunflower is Happiness, Vitality, Devoted love, Freedom, Beauty, Hope, unbending Faith, Prosperity, Strength, Success and Endurance. 
The Native Americans use it as a symbol of Bounty, Harvest and the life    giving force of the Great Spirit.
In Chinese symbolsm, it  represents long life, good luck and is considered very  auspicious, as it is always seeking out the light, following the  path of the sun all day.