The old tannery stored baskets of gall-nuts for making ink and dye.

The artisan collected oak-gall from the old forest to make traditional ink.

The historian carefully recorded how the villagers collected gall-nut for use in traditional dyeing.

During our tour of eastern Switzerland, we spent a rainy afternoon exploring the abbey library in St. Gall.

The meadow was dotted with strange gall flowers that attracted curious botanists.

The botanist carefully preserved a gall flower she had found on the oak branch.

The classroom displayed a map using the Gall-Peters projection to emphasize the true relative sizes of countries.

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

The botanist collected oak galls from the ancient tree to study the insects that caused them.

The ecologist photographed a cluster of knopper galls to document the gall wasp's life cycle.