It's healthy to vent one's gall occasionally instead of keeping resentment bottled up.

Although the city is now known as Galle, many nineteenth-century maps still refer to it as Point de Galle.

Scientists examined a witch-hazel cone gall to study how the aphid Hormaphis hamamelidis manipulates leaf tissue.

The scientist carefully collected witch-hazel cone galls from the garden for study.

Researchers observed the witch-hazel cone gall aphid manipulating leaf tissues to form protective structures.

Researchers observed witch-hazel cone gall aphids clustering along the twig tips every spring.