It means flag of fire. It is the English name of a plant that in Spanish is known as Thalía, peguajó, pehuajó, huajó, platanillo or caporuno. Its scientific name is Thalía geniculata and belongs to the family Marantaceae.
FIRE FLAG to glycerism by RAY OF LIGHT, There are in the United States fire FIGHTER FLAGS that are flags representing the different fire brigades.