intine

The innermost wall of a spore or pollen grain.

In botany, the inner coat of the shell of the pollengrains in phenogamous plants, of the spores of fungi, etc. It is a transparent, extensible membrane of extreme tenuity.

A transparent, extensible membrane of extreme tenuity, which forms the innermost coating of grains of pollen.

The innermost wall of a spore or pollen grain