Note 2873 — BOOK XXIII. THE REMEDIES DERIVED FROM THE CULTIVATED TREES.
John Bostock translation
Pliny seems again to have fallen into the error of mistaking οὖλον, the “gums” for οὐλὴ, a “cicatrix;” the corresponding passage in Dioscorides, B. iv. c. 156, being “defluxions of the gums.”