Materially shriveled at capstem means that the skin of the berry is definitely wrinkled adjacent to the capstem and the surface is materially sunken.
Code of Federal Regulations
[36 FR 9126, May 20, 1971. Redesignated at 42 FR 32514, June 27, 1977, and further redesignated at 46 FR 63203, Dec. 31, 1981. Redesignated at 56 FR 15802, Apr. 18, 1991]