Evolutionary Quirks Helped Poinsettias Rule the Holidays

Poinsettias are a holiday icon. Their crimson colors are so commonplace this time of year that they practically blend into the background. And once the holidays are over, they'll disappear like so many Christmas trees.But these seemingly boring flowers actually hide a fascinating history. Poinsettias owe their holiday prevalence to some weird quirks of evolution — and one clever Southern California entrepreneur.
Christmas Colors
The poinsettia has been tied to Christmas for centuries,