ClipArt ETC
Pictured is the stem of a white pine tree attacked by the white pine blister-rust fungus, <I>Cronartium ribicola</I>. Illustrated is the fruiting stage in the process of rupturing the bark.

White Pine Tree Stem with Fungus

Pictured is the stem of a white pine tree attacked by the white pine blister-rust fungus, Cronartium…