[ˌɛndəˈθiːsiə]

Definitions

1. noun

The innermost layer of a fern sporangium or the cup-like structure at the base of a fern spore-bearing organ, containing the spores.

“The unique structure of the fern’s endothecia allows for efficient spore dispersal.”

2. noun

A cup-like or sac-like structure found in some ferns, typically containing spores.

“The endothecia of the fern played a crucial role in its reproductive cycle.”