Noun:

மாவித்திக் கலன்,

megasporangia தமிழ் அர்த்தத்தின் உதாரணம்:

None

megasporangia's Usage Examples:

Selaginella is heterosporous, the megasporangia being often found towards the base of the cone.

It is very doubtful whether any homosporous Lepidostrobi existed, but there is reason to believe that here, as in the closely allied Lepidocarpon, microsporangia and megasporangia were in some cases borne on different strobili.

In Selaginellites Suissei there was a definite strobilus bearing both microand megasporangia; in each of the latter from 16 to 24 megaspores were contained; in Selaginellites primaevus, however, the number of megaspores was only 4, and the resemblance to a recent Selaginella was thus complete.

The development of the microand megasporangia is the same up to the stage of isolation of the spore mother-cells.

in the cone attributed to the Lower Carboniferous Lepidodendron Veltheimianum) the arrangement was that usual in Selaginella, the microsporangia occurring above and the megasporangia below in the same strobilus (diagram, fig.

Binneyana and in the megasporangia of C.

They consist either of microsporangia or megasporangia, which are arranged in basipetal succession on the receptacle.

Each sorus includes both microsporangia, with numerous spores, and megasporangia, each of which contains a single megaspore with a complicated wall.