Persisting in the winter months as ball-shaped shells on oak trees, galls, which are considered an eyesore by landscapers in the summer months, appear as a sort of curiosity in winter. What are these ...

ST. LOUIS — The next time you're outside in your neighborhood, look up. Among the branches of oak trees across Missouri, people are noticing more growths than before. They're called galls, and they're ...

Bulging horned oak galls can be seen on fallen limbs piled up on the street in the 6400 block of Loughborough Avenue in front of a dead oak tree in 2023. The golf ball-size growths on oak twigs are ...

Trees add value to the landscape, so homeowners may become concerned when their trees develop unusual growths. Here are some questions about these growths with answers from horticulturists at Iowa ...