indusium

• Мембрана, которая заключает и защищает развивающиеся споры, в частности структура, покрывающая сорусы папоротника.

A membrane that encloses and protects developing spores, particularly the structure covering the sori of a fern.

1. Fern spore coveringC2formalscientific

   A thin membrane that covers and protects the developing spore clusters (sori) on the underside of fern leaves.

   Покрывальце

   • The indusium of the fern was clearly visible under the microscope.
   • Botanists study the shape of the indusium to identify different fern species.
   • As the spores mature, the indusium often shrivels and falls away.