. Contributions from the Botanical Laboratory and the Morris Arboretum of the University of Pennsylvania, vol. 13. Botany; Botany. 4 ?? 1 > ^1^ WHITETOP PITCHERPLANT Sarracenia drummondii Croom The evolutionary changes which resulted in the development of the showy red-flowered Sarracenia jonesii from a rather inconspicuous green-flowered ancestor did not come to an end with that species, but continued along several lines. The tendency toward increased size and coloration reached a culmination in whitetop pitcherplant, the showiest of our species. The common name selected for it refers to t
. Contributions from the Botanical Laboratory and the Morris Arboretum of the University of Pennsylvania, vol. 13. Botany; Botany. 4 ?? 1 > ^1^ WHITETOP PITCHERPLANT Sarracenia drummondii Croom The evolutionary changes which resulted in the development of the showy red-flowered Sarracenia jonesii from a rather inconspicuous green-flowered ancestor did not come to an end with that species, but continued along several lines. The tendency toward increased size and coloration reached a culmination in whitetop pitcherplant, the showiest of our species. The common name selected for it refers to the predominance of white in the hood. Development of this pitcherplant evidently took place somewhere in the headwaters of the Alabama River system. The Tertiary mountain-making exterminated it from its ancestral home, but seeds traveled downstream and soon colonized the Coastal Plain. Spreading laterally from this river valley, it migrated a short distance westward into Mississippi and somewhat farther toward the east, into the western extension of Florida. It also formed two isolated colonies, one in Madison County, Florida, the other in Sumter County, Georgia. Reports of its occurrence farther northeast seem to be based on misidentification of other species. FIGURE 5 Distribution of whitetop pitcherplant, Sarracenia drummondii 12. 13. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original University of Pennsylvania. Botanical Laboratory; University of Pennsylvania. Morris Arboretum. Philadelphia : [s. n. ]
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