Prematurity.
CFR · 2024-01-01 · US · Title 7
A condition of growth and development characteristic of the lower leaves of the tobacco plant. Premature leaves have some appearance of ripeness due to a process of starvation caused by translocation of plant food elements from these leaves to other leaves higher on the stalk.
official document · source cfr-2024 · id 7:§ 29.1050