Our Fable 3 Auroran Flowers Locations Guide shows the total of 30 Auroran Flowers to be found in the Xbox 360 game.
Once you collect all 30 Auroran Flowers you will unlock the “Flower Power” Achievement worth a total of 30 Gamerscore.
These flowers are not quite difficult to collect compared to the other collectibles in the game such as the Legendary Weapons. Your dog also does an excellent job at sniffing majority of them out, as long as his Exploration is a Level 3 or higher.
My advice to you would be to get his Exploration to Level 3 when you decide to start looking for them. If you find them along the way, make sure to mark which ones you have collected already so you know when you return to collect them when he has been leveled up.
There are 6 different Auroran Flowers of these 30: Red, Blue, Green, Orange, Purple and Yellow.