Årg. 194 Nr. 1 (1971): Meddelelser om Grønland

General Introduction. p. 7
The vegetation of rocky hilltops, ledges, crevices and talus. p. 9
Introduction. p. 9
Topography and soils. p. 10
Site factors. p. 10
Coverage of the ground by vascular plants. p. 10
Moisture supply. p. 11
Disturbance factors. p. 11
The vegetation. p. 11
Behavior of vascular species on gradients of ground coverage, moisture, and physical disturbance. p.12
The coverage gradient. p. 12
The moisture gradient. p. 13
The frost disturbance gradient. p. 13
The nonfrost disturbance gradient. p. 14.
Some general observations on the relations of vegetation to frost action. p. 15
The vegetation of nonsorted circles and related forms. p. 17
Introduction. p. 17
Description of the sites. p. 18
Site factors. p. 25
Coverage of the ground by vascular plants. p. 26
Moisture supply. p. 27
Disturbance by frost action. p.  28
Disturbance by nonfrost processes. p. 32
The vegetation. p. 33
The flora. p. 33
The vegetation of the principal habitats. p. 35
Behavior of the species on gradients of coverage, moisture and physical disturbance. p. 36
The coverage gradient. p. 36
The moisture gradient. p. 36
The frost disturbance gradient. p. 37
The nonfrost disturbance gradient. p. 37
The vegetation of small polygons on emerged delta remnants. p. 39
Introduction. p. 39
Topography and soils. p. 39

Site factors. p. 42
Coverage of the ground by vascular plants. p. 42
Moisture supply. p. 43
Disturbance of the soil by frost action. p. 45
Disturbance by nonfrost processes. p. 46
The vegetation. p. 47
Behavior of vascular plants on gradients of ground coverage, moisture and physical disturbance. p. 48
The coverage gradient. p. 48
The moisture gradient. p. 49
The frost disturbance gradient. p. 49
The nonfrost disturbance gradient. p. 49
The vegetation of large nonsorted polygons. p. 50
Introduction. p. 50
Topography and soils. p. 50
Site factors. p. 54
Coverage of the ground by vascular plants. p. 54
Moisture supply. p. 54
Physical disturbance by frost action. p. 55
Disturbance by nonfrost processes. p. 55
Summary. p. 56
The vegetation. p. 56
Behavior of the vascular species on gradients of ground coverage, moisture and physical disturbance. p. 58
The coverage gradient. p. 58
The moisture gradient. p. 58
The frost disturbance gradient. p. 58
The nonfrost disturbance gradient. p. 58
The vegetation of debris islands. p. 60
Description of the debris island sites. p. 60
Site factors. p. 62
The vegetation. p. 62
Behavior of the species on gradients of coverage, moisture and physical disturbance. p. 63
The coverage gradient. p.  64
The moisture gradient. p. 64
The frost disturbance gradient. p. 64
The nonfrost disturbance gradient. p. 64
The vegetation of large sorted nets. p. 65
Introduction. p. 65
Topography and soils. p. 65
Site factors. p. 69
Coverage of the ground by vascular plants. p. 69
The moisture supply. p. 69
Disturbance by frost action. p. 69
Disturbance by nonfrost processes. p. 75

The vegetation. p.78
The vascular flora. p. 78
Vegetation of the principal habitats. p. 79
Behavior of the species on gradients of coverage, moisture and physical disturbance. p. 81
Introduction. p. 81
The coverage gradient. p. 82
The moisture gradient. p. 82
The frost disturbance gradient. p. 82
The nonfrost disturbance gradient. p. 83
Summary and discussion. p. 84
Introduction. p. 84
Comparison on the coverage gradient. p. 85
Comparison on the moisture gradient. p. 85
Comparison of the frost disturbance gradient. p. 88
Comparison on the nonfrost disturbance gradient. p. 90
Literature cited. p. 92