gall-nut

There are fine oaks in the country, and that noble tree bears a gall-nut filled with crimson sap.

Southern Prose and Poetry for Schools 1910

The gall-nut contains gallic and gallo-tannic acid, and which acids, in conjunction with an iron salt, forms the sole base of the best ink.

Forty Centuries of Ink 1904

I will state in passing that the Report for 1855 also contains notices of the best mode of cultivating many other medicinal plants -- such as the rhatany, gall-nut oak, Iceland moss, liquorice, quassia, senna, gum arabic, etc.

Resources of the Southern Fields and Forests, Medical, Economical, and Agricultural. Being also a Medical Botany of the Confederate States; with Practical Information on the Useful Properties of the Trees, Plants, and Shrubs 1863

But the old woman, who was every moment in dread lest the lion should pursue her, had not taken off the ass's skin, and when Parsley now threw down the third gall-nut there sprang up a wolf, who, without giving the ogress time to play any new trick, gobbled her up just as she was in the shape of a jackass.

Pentamerone. English Giambattista Basile 1603

They are a species of gall-nut, and are described by Curzon (_Visits to

The Works of Lord Byron. Vol. 2 George Gordon Byron Byron 1806