integumentum: covering] • A protective surface structure. In gymnosperms and angiosperms, a layer of tissue around the ovule which will become the seed coat. Gymnosperm ovules have one integument, angiosperm ovules two.
The outer tissue layers of an ovule, covering the megasporangium. The earliest-evolved plants in which an integument (or ovule, for that matter) can be seen are the "gymnosperms," and a double integument is found in many flowering plants. |Lab 12 - Reproduction in Seed Plants