The relationships between abundance of dwarf mistletoe (Arceuthobium americanum Nutt.) and the canopy structure of stands of lodgepole pine (Pinus contorta var. murrayana (Grev. ###>Les relations entre l'abondance du faux gui (Arceuthobium americanum Nutt.) et la structure du couvert des peuplements de pin tordu latifolié (Pinus contorta var. murrayana (Grev.