One of our instructors told me that "heterospory" now means
that the two types of spores are not necessarily different in
size, but always produce gametophytes of only one sex or the
other (dioecious, i.e.) so that mosses with dioecious gametophytes
are "heterosporous", etc. Is this the case? Our text (Campbell)
does not say this. But perhaps some major change has come
about. What then happens to plants with only one kind of
sporangium? What happens to "microspores and megaspores"?
Do we need more terminology tacked on now? Comments welcome! -NH
