Pedicularis canadensis may increase survival rate

"In only one species, P. argophyllum, did the hemiparasite treatment affect survival (P = 0.05). For this species, survival rates ranged from 0% when no hemiparasites were present to 40% when two P. canadensis were present. Land use was also a significant predictor with an average survival rate of 6.1 +/- 1.4% in old agricultural field and 30.0 +/- 2.7% in restoration."