Description:hard hummock-forming, in the wild from a few centimetres to over 1m. Across
Habitat:mountain tops and wet screes where snow lies for several months each year
| Form of cushion | F | Low cushion |
| Compactness | 1 | Compact, hard (peat-accumulating) |
| Variability | 0 | No variability |
| Root system | A | Numerous adventious roots |
| Woodiness | NA | NA |
| Thorniness | 0 | No |
| Succulence | 0 | No |
| Flowers | 0 | Flowers sessil |