From the text...'Slash pine (Pinus elliottii) is one of the hard yellow pines indigenous to southeastern United States. Other names occasionally used for this species include southern pine, yellow slash pine, swamp pine, pitch pine, and Cuban pine. It is one of the two southern pines used for naval stores and one of the most frequently planted timber species in North America. Two varieties are recognized: P. elliottii var. elliottii, the slash pine most frequently encountered, and P. elliottii var. densa, that grows naturally only in the southern half of peninsula Florida and in the Keys.'