Dracaena draco, so named for its thick red sap which was likened to dragons blood. Dracaenas are members the Agave family, with the majority of the 40-some species originating in Africa, a handful from Asia, and one from the Americas. In their native habitat, they thrive in the understory of tropical rainforests, which goes a long way toward explaining their preference to low light and warm humid conditions. Flouride may be good to help stop cavities, but dracaenas aren't to keen on it.
Many cities now add flouride to the water.
Too much flouride shows itself in many different ways, but, generally, what to look for is elongated, brownish leaf spots, orange blotches and tip burn. Flouride damage also shows up more when the plant is allowed to completely dryout . People may believe that they just cannot grow plants indoors when they are in fact slowly hurting the plant by watering.