They have been found in the prothallia of all ferns known to be apogamous. of the embryo from a single diploid cell produced by the fusions of two prothallial cells and their nuclei. The fusion of these cells, in the cushion of the gametophyte, was described as a "substitu- tion" fertilization.

Who gave apogamy?

In the year 1874, Farlow discovered the natural occurrence of apogamy in Pteris cretica. Dryopteris, Pteris, Osmunda, Adiantum are the ferns in which apogamy occurs naturally. Generally, the sporophyte which develops from gametophyte, when the fusion of gametes occurs are diploid (2n).

What is apogamy in plants?

Apogamy refers to an asexual reproduction process in plants where the embryo forms without undergoing fertilization. In such plants, sporophyte develops from the gametophyte without undergoing fertilization.