On Carya glabra
https://gallformers.org/gall/1579
Gagne: "tissue on apical third eventually collapsing somewhat and becoming furrowed when mature;... larval chamber located basally, ovoid, lined with yellowish pellicle different in texture from surrounding soft, spongy, green to purple, viscous tissue that partially collapses with age;
a bundle of fibers present between apex of larval chamber and gall apex."
Mockernut/C. tomentosa
Carya laciniosa
Carya/Hickory