a heteroecious macrocyclic fungal disease caused by Cronartium ribicola that forms swollen fusiform cankers on stems and branches of pines throughout Asia, Europe, and North America —note telial hosts of white pine blister rust include Ribes sp. and (in Asia) Pedicularis sp.; aecial hosts include pines within the foxtail, stone, and white pine groups —see aeciumThis definition last updated 08/19/2008