archegonium

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Related to archegonia: megaspores
Archegoniumclick for a larger image
Fig. 43 Archegonium . Mature archegonium of Marchantia (Hepaticae).

archegonium

(pl. archegonia) the female sex organ of BRYOPHYTA, PTERIDOPHYTES and most GYMNOSPERMS.
References in periodicals archive ?
Antheridia also outnumbered archegonia in forests of 10 years-since-harvest.
Age of forest did not seem to have affected the timing and sequence of development for archegonia and antheridia so, as was done for sporophytes, data were pooled for each species to better demonstrate any pattern in phenological development.
a large number of archegonia (200+), and the male gametophyte produces
In Douglas-fir, there are four to six archegonia per ovule, but an average of less than two of these are fertilized.
This species is considered apogamic because, in vitro, it does not form archegonia and the sporophytes developed have an apogamic origin.
to 100 or more archegonia per megametophtye, though only a few are
In addition, gametophytes growing on soil frequently produce archegonia, whereas those growing on rock have high gemmae production (Farrar, 1978).