flowering harebell campanula rotundifolia on infertile inhospitable hard dry ground between the rocks of the alps

alps bastion beautiful bedrock blossom blue boulder campanula color crevice disturbance dry fissure flower flowering fold footing fragility geology green ground hard harebell infertile inhospitable layer lime limestone mineral mineralogy nature petal plant precious rock rocks rotundifolia schist slab slate soil solidity stone stratification stratified summer support tectonics ventilation