In the fields of Atlixco, San Fúlix Hidalgo, San Pedro Cholula and San Gregorio Zacapechpan in the central Mexican state of Puebla, golden flowers shine like the sun next to an elegant purple flower.

Add Yahoo as a preferred source to see more of our stories on Google. While we're more than happy to get a bountiful bouquet of flowers from our valentine, very few of us take the time to think about ...