highly significantp < 0.0001
Frost‐Tolerance of Twenty‐Two Alpine Species There were highly significant differences in frost tolerance (LT 50 ) among the selected plants (Figure 1 ; Df = 21, F = 41.55; p < 0.0001), ranging from −21.89°C in Oxytropis proboscidea to −0.22°C in Thalictrum alpinum (lower LT 50 value indicates higher frost‐tolerance).