-
always haploid.
Vascular plants are
either homosporous (or isosporous) or heterosporous.
Plants that are
homosporous produce spores of the same size and type...
- fungi.
Homosporous ferns secrete a
chemical called antheridiogen.
Extant lycophytes produce two
different types of gametophytes. In the
homosporous families...
-
Ceratopteris is the only
genus among homosporous ferns that is
exclusively aquatic. It is pan-tropical and
classified in the
Parkerioideae subfamily of...
-
during development or
later in life. In the fern
Ceratopteris and
other homosporous fern species, the
default **** is hermaphrodite, but
individuals which...
- they are cosmopolitan,
excluding arid environments.
Lycopodiaceae (
homosporous lycophytes)
split off from the
branch leading to
Selaginella and Isoetes...
-
photosynthetic and with
whorls of branches.: 12–15
Horsetails are
mostly homosporous,
though in the
field horsetail,
smaller spores give rise to male prothalli...
- spore-cases (sporangia)
contain spores of one kind only, (isosporous,
homosporous), and are
borne on the
upper surface of the leaf
blade of specialized...
-
plants had
sporophytes that
produced identical spores (isosporous or
homosporous) but the
ancestors of the
gymnosperms evolved complex heterosporous life...
-
classification artificially split the ferns,
Christian Luerssen subdivided the
homosporous ferns only into
Eusporangiatae and
Leptosporangiatae in 1884–9. The latter...
-
pointed microphylls protruding from the cone. The
extant horsetails are
homosporous, but
extinct heterosporous species such as
Calamostachys casheana appear...
