Economic botany of Alabama (1913-1928) Economic botany of Alabama economicbotanyof12harp Year: 1913-1928. 70 ECONOMIC BOTANY OF ALABAMA Fig. 17. Burned forest of Jiiiii/^criis J'irf/iiiiaiia on limestone slopes of Smithers Mountain (above the Hartselle sandstone), Madison County, March 16, 1913. This is a very unusual sight, for the habitats of the cedar are generally well protected from fire. The fire probably originated in the oak woods on the sandstone below, and ran up the slope. soils. In Alabama and other soiitliern states the cedar is com- monly regarded as being especially partial
Economic botany of Alabama (1913-1928) Economic botany of Alabama economicbotanyof12harp Year: 1913-1928. 70 ECONOMIC BOTANY OF ALABAMA Fig. 17. Burned forest of Jiiiii/^criis J'irf/iiiiaiia on limestone slopes of Smithers Mountain (above the Hartselle sandstone), Madison County, March 16, 1913. This is a very unusual sight, for the habitats of the cedar are generally well protected from fire. The fire probably originated in the oak woods on the sandstone below, and ran up the slope. soils. In Alabama and other soiitliern states the cedar is com- monly regarded as being especially partial to limestone, btit there seems to be no such relation in New England, and even with us it grows perfectly well on granite and sandstone. The cedars near the coast of the southeastern states are re- garded by some of the splitters as a distinct species, which has been called at different times Juiiipcnis Barbadciisis, J. Lucayana, and Sabiua silicicohi; but the alleged differences are very small. And if there were really two species in these states one of three conditions could have to be fulfilled. First, their ranges might be entirely distinct and widely separated, like those of the closely related Piiiits J'ir(/iiiia}ia and P. cluiisa, already mentioned. But there is no considerable gap, as the map shows, and if the coast cedars are really different from those in the Tennessee Valley those in the lime hills would probably have to be put with them. Second, they might intergrade over an ill-defined zone, as many pairs of doubtfully species seem to do. But the splitters have not suggested any intergradation. Third, they might overlap and oc- ctipy different habitats in the zone common to both, like our two
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