Mother's Day is considered the Super Bowl of the floral industry, one of the three busiest holidays for flower and plant purchases and deliveries, according to Fortune Magazine.This year, Tulsa florists are heading into the holiday rush with fuel costs cutting into their bottom line from multiple directions.Gas prices in the Tulsa area are averaging just under $4 a gallon for regular unleaded, according to AAA.That's a sharp jump from around $2.…