Gall.
This is an irregular, thick-walled, somewhat spongy, usually monothalamous gall with a diameter of 5 to 7 mm., which occurs tightly packed in Cypress cones. These galls are evidently modified seeds and the shape is determined to a great extent by the growth of those adjacent.
- EP Felt: (1916) New North American gall midges©
Reference: https://www.biodiversitylibrary.org/page/2561018#page/501/mode/1up