The same moisture which caused the antheridia to open also brings about the opening of the archegonia.
antheridia immersed in the thallus, covered with dentate scales.
The antheridia open by means of a cap cell or groups of cells with mucilaginous contents.
Paraphyses, jointed filaments mixed with the antheridia of Mosses.
Mycelium present; antheridia but no antherozoids; oogonia with one or more oospheres: Peronosporaceae, Saprolegniaceae.
They are reproduced by means of antheridia and oogonia developed in conceptacles, clustered together at the apex of the branches.
Among the antheridia are borne peculiar hairs (Fig. 59, p) tipped by a large globular cell.
If these are carefully separated, the antheridia can just be seen as minute whitish globules, barely visible to the naked eye.
antheridia 3–20, in the axils of small saccate leaves, which are scarcely imbricate or crowded into terminal heads.
The sexual organs, with the exception of the antheridia of Sphagnum, are borne at the apices of the main shoot or of branches.
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.