2 Hastings, R.I. 1983 Edmonton University of Alberta 100 Ground ice, Plant-soil relationships, Plants (Biology), Slopes, Soils, Tundra ecology, Wetlands, Mackenzie Delta, N.W.T. The vegetation and soils of an involuted hill, a massive ground-ice landform on the Pleistocene Mackenzie Delta, were described quantitatively and qualitatively. The vegetation from 34 stands was classified into 5 community types (ct's) within 3 tundra groups, using minimum variance cluster analysis, principal components analysis and field observations. The Upland Tundra Group occurs on the outer ridges of the hill, on midslope positions and on the large ice-wedges of the hill's central plateau. ... The Depressional Wetland Tundra Group occurs in wet, low-lying, sites in which the ground water is stagnant. ... The Lotic Wetland Tundra Group is found only along drainage channels that dissect the outer ridges of the hill. ... All the ct's found on the involuted hill have been reported from other low arctic sites in North America. However, while the Depressional Wetland Tundra Group appears to be common along the arctic coastal plain, the Upland Tundra Group is more characteristic of the Foothills province of Alaska. It appears that the upland sites on involuted hills act as disjunct foothill elements.