Oogonium with the central uninucleate oosphere and the fertilizing tube (a) of the antheridium which introduces the male nucleus.
A fruiting portion, magnified, showing the structure; a sporocarp, and an antheridium.
It is remarkable that amongst these fungi the tube projected by the antheridium effects fecundation only by contact.
Spermatozoids are formed in the antheridium, and these enter the archegonium and fertilize the germ cell.
The male plant has no definite stem, and consists of a single concave leaf protecting the antheridium.
These particles become globose cells, grouped in the centre of the antheridium.
These cells, especially the outer ones, develop a great amount of a red pigment, giving the antheridium its characteristic color.
It is seldom that more than one antheridium applies itself to an oogonium.
antheridium (plural antheridia), the organ in Cryptogams which answers to the anther of Flowering Plants, 150.
The antheridium consists at first of a basal cell and a terminal one.
Plural antheridia (ān'thə-rĭd'ē-ə)
An organ in certain organisms that produces male gametes. Antheridia are found in many groups of organisms, including the bryophytes, ferns, ascomycete fungi, and some algae. Most gymnosperms and all angiosperms, however, have lost the antheridium, and its role is filled by the pollen grain. Compare archegonium.