-
cluster of
sporangia that have
become fused in
development is
called a
synangium. This
structure is most
prominent in
Psilotum and
Marattiaceae such as...
- stems.
Psilotum has been
interpreted as
producing sporangia (fused in a
synangium) on the
terminus of a stem.
Equisetum always produce strobili, but the...
-
differ from
those in
Tmesipteris in
having stems with many
branches and a
synangium with
three lobes rather than two.
Whisk ferns in the
genus Psilotum lack...
-
Asterotheca exhibited eusporangia that are
partially fused within a
larger synangium that is most
commonly characterized with four to
eight sporangia. The...
- segments.
Compare gamophyllous (synonym), apophyllous, and polyphyllous.
synangium A
fused aggregate of sporangia, e.g. in the
trilocular sporangia of the...
- of spores, up to 7,000
spores per sporangium. The
presence of a
radial synangium is an
archaic character, very
similar to some of the
fossil Asterothecaceae/Psaroniaceae...
- 'becoming purple'. The
sporangia are
fused in all
Ptisana into a
bivalvate synangium.
Conservation plans have been
proposed for
Ptisana purpurascens, an endemic...
- but
their tips may be free. The
entire structure can be
described as a '
synangium'.
Blackened material inside the
sporangia was ****umed to have been spores...
- however, the side of each
sporangium that
formed the
outer surface of the
synangium tended to be
thicker than the inwards-facing wall,
suggesting that the...
-
Pachytesta permineralized ovules Trigonocarpus ovule casts Bernaultia synangium Alethopteris leaves Medullosa permineralized stem
Myeloxylon permineralized...
