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the female reproductive organ in ferns, mosses, etc.
historical examples

the same moisture which caused the antheridia to open also brings about the opening of the archegonia.
how to know the ferns s. leonard bastin

the archegonia (fig. 61) should be looked for in the younger plants in the neighborhood of those that bear capsules.
elements of structural and systematic botany douglas houghton campbell

as a rule, too, in the prothallus only one of the archegonia shows any further signs of development.
how to know the ferns s. leonard bastin

the archegonia have a shorter neck than those of the ferns, and the neck is straight.
elements of structural and systematic botany douglas houghton campbell

the necks of the archegonia hardly project above the general surface of the thallus.
encyclopaedia britannica, 11th edition, volume 4, part 3 various

the s-xual organs are borne on the upper surface, and both antheridia and archegonia occur on the same branch (fig. 3, a).
encyclopaedia britannica, 11th edition, volume 4, part 3 various

the archegonia are borne at the apex of the main stem or of a lateral branch.
encyclopaedia britannica, 11th edition, volume 4, part 3 various

in addition special involucres around the archegonia have arisen independently in several series.
encyclopaedia britannica, 11th edition, volume 4, part 3 various

the archegonia are protected by being sunk in depressions of the disk or by a special two-lipped involucre.
encyclopaedia britannica, 11th edition, volume 4, part 3 various

the female plant is rather more highly organized, consisting of a short stem bearing a few leaves around the group of archegonia.
encyclopaedia britannica, 11th edition, volume 4, part 3 various

noun (pl) -nia (-nɪə)
a female s-x organ, occurring in mosses, spore-bearing vascular plants, and gymnosperms, that produces a single egg cell in its swollen base
archegonium
(är’kĭ-gō’nē-əm)
plural archegonia
the egg-producing organ occurring in bryophytes (such as mosses and liverworts), ferns, and most gymnosperms. the archegonium is a multicellular, often flask-shaped structure that contains a single egg. compare antheridium.