In the Florideae, Lichens and Laboulbenjaceae the, male cell is a non-motile spermatium, which is carried to the female organ.
Only when a spermatium was found attached to the trichogyne did the further development of the ascogonium take place.
From these observations he drew the natural conclusion that the spermatium was a male, sexual cell.
B, Apex of the trichogyne with the spermatium, s, (X405) attached (>0125).
Fertilization is effected by the passive convection of a spermatium from the antheridium to the trichogyne, to which it adheres, and to which it passes over its nucleus through an open communication set up at the point of contact.
The male cell is a spermatium, but the female cell bears no such receptive trichogyne as occurs in other Rhodophyceae.