-
Polysiphonia it
consists of a
sequence of a gametangial,
carpospoangial and
tetrasporangial phases.[page needed] Male (haploid)
plants (the male gametophytes)...
- one or two
layers of
small cells.
Gametangial plants are unknown.
Tetrasporangial patches occur in the
center of the blade. It is
found in rock pools...
-
globular rather than
small and oblong, and
there is a
single row of
tetrasporangial sori
rather than the
multiple irregular rows of P. ****onica. Guiry...
-
narrow lamina and
cystocarp forms near the apex on a
short stalk.
Tetrasporangial bladelets are oval in
shape and up to 4 mm in size.
Growing on rock...
-
decussate stamens in
pairs of 40–70 in a spiral, non-versatile, basifixed,
tetrasporangial, latrorso,
apiculate anthers,
dehiscence along 2
longitudinal valves...
- thick.
Conceptacles small but
raised and visible.
Carposporangial and
tetrasporangial conceptacles are common. Very
common growing epiphytically on other...
-
rhizoids are
numerous growing from the
pericentral cells.
Gametangial and
tetrasporangial plants are not known.
Reproduction is by
specialized propagules England...
-
history is a
sequence of
three phases: gametangial,
carposporangial and
tetrasporangial. The
plants are
dioecious with ****tangial
branchlets at the apices...
- California), or only
tetrasporangial and
bisporangial specimens (Caribbean). In the
Australian po****tions of A. beauvoisii,
tetrasporangial forms are common...
-
release these germinate and
develop into the
gametangial phase. No
tetrasporangial phase is known. (Dixon and
Irvine 1977 p. 148)
However tetraspores...
