Assertion: sporophyte's number | /r/AtLocation | various angiosperms
Facets:
Source sentences:
text: A number of variations in pattern of development of the female gametophyte occur in various angiosperms; for example, in certain species of evening primrose (Oenothera), the female gametophyte contains only 4 nuclei, whereas in Peperomia, as many as 16 may be present.