On Cunila origanoides (L) Britt. (Dittany), bud gall, on ends of aborted upper branches; prosoplasma, up-walled type; sub-spherical, tipped with short point, 2β3.5 mm. diam., green at first early becoming bluish-purple, surface glandular same as leaves, sessile on branch end, invested below by an involucre of a few inconspicuous, foliaceous bracts; chamber large, same shape as gall, wall thin, similar to leaf in texture though slightly thicker than leaf; few on any one plant.
β- B.W. Wells: (1921) New United States zoocecidiaΒ©
Reference: https://www.biodiversitylibrary.org/page/12112726#page/55/mode/1up