Life in the rock

In scree slopes, life conditions are difficult for plants, and the fallen rock debris can become unstable and migrate slowly downslope by solifluxion. Many different strategies can be adopted by plants to survive. Studies conducted in the Pyrenees have shown there are two strategies:1/ Immigrant lithophilic plants can anchor and extend their roots even while the rockslides are moving,2/ Some trees such as hook pine are able to stretchtheir trunks while remaining anchored far upslope.