Abstract
Abstract Progeny of presumed natural hybrids of shortleaf (Pinus echinata Mill.) and loblolly pine (Pinus taeda L.) growing in the Piedmont of South Carolina were found to have height and diameter growth rates between that of the two species. Survival of these trees was less than loblolly but no differences were found between them and shortleaf pine. Incidence of fusiform rust was low with the putalive hybrid having a infection rate 3 to 11 percent lower than loblolly pine. These putative hybrids, perhaps natural hybrids of loblolly and shortleaf pines, also offer potential resistance to littleleaf disease and would be a planting alternative to shortleaf pine in certain areas.
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