- blister rust, white-pine rust, white pine blister rust - any of several diseases of pines caused by rust fungi of the genus Cronartium and marked by destructive invasion of bark and sapwood and producing blisters externally
--1 is a kind of rust
- blister rust, Cronartium ribicola - fungus causing white pine blister rust and having a complex life cycle requiring a plant of genus Ribes as alternate host
--2 is a kind of rust, rust fungus
--2 is a member of Cronartium, genus Cronartium