-
microspores of both
exosporic and
endosporic species are free-sporing,
distributed by wind,
water or
animal vectors, but in
endosporic species the
megaspores and...
- wall open on
germination and
develop outside it. The
megagametophytes of
endosporic plants such as the seed
ferns developed within the
sporangia of the parent...
- do not
acquire nutrients from the soil.
Endosporic megagametophyte evolution directly correlates with
endosporic microgametophytes,
which are extremely...
- of the sporophyte, a
condition known as endospory.
Seeds consist of an
endosporic megasporangium surrounded by one or two
sheathing layers (integuments)...
- male gametophytes, respectively), and in that
their gametophytes are
endosporic,
meaning that they
never grow
outside the
spore wall and
cannot become...
- the
Devonian period.
Fossils of
these plants show that they
produced endosporic gametophytes,
meaning that
their gametophytes were not free-living as...
- plants, the
gametophytes also
develop inside the spores, i.e., they are
endosporic.
Since the
flowers are the
reproductive organs of the plant, they mediate...
-
produce both
microspores and megaspores), the
gametophytes develop endosporically (within the
spore wall).
These gametophytes are dioicous, producing...
- of
ornamentation except for tiny papillae.
Gametophyte development is
endosporic, so that cell
divisions begin inside the
spore wall. This
pattern of development...
-
produces multicellular diaspores that detach.
Spores do not have any
endosporic features. In
defining environmental requirements,
taxonomic controversies...
