endexine
/ɛnˈdɛksɪn/
noun
- The inner layer of the exine (outer wall) of a pollen grain or spore.
- The endexine is often more resistant to decay than the outer layers of pollen.
- Under a microscope, the endexine appears as a thin, dark layer inside the pollen wall.
- Scientists study the endexine to identify different plant species from fossil pollen.