- hypothesis,
which held that
gnetophytes were
sister to the
flowering plants. In the
gnetifer hypothesis, the
gnetophytes are
sister to the conifers, and...
- 95–100
species of
Gnetophytes and one
species of Ginkgo. The
ginkgo or
maidenhair trees are tall and have
bilobed leaves,
while gnetophytes are a diverse...
-
includes the
gnetophytes, cycads, ginkgo, and conifers.
Older morphological studies believed in a
close relationship between the
gnetophytes and the angiosperms...
- conifers,
which have
simple pollen strobili and
compound seed strobili,
gnetophytes have both
compound pollen and seed strobili. The seed
strobili of Ephedra...
- thin,
biseriate (two cell-layer)
integument of
gnetophytes.
Bennettitaleans also lack
another gnetophyte-like trait: a
sheath of
fused bracteoles enveloping...
- cycads, conifers,
gnetophytes and angiosperms. The two most
common are that
Ginkgo is a
sister to a
clade composed of
conifers and
gnetophytes, and that Ginkgo...
-
placement of
Gnetophytes,
which have been
traditionally excluded from the conifers,
though recent molecular evidence suggest gnetophytes are the sister...
- may be used for all
gymnosperms (i.e.
including cycads,
ginkgos and
gnetophytes), or for
conifers alone as below.
Since the
first publication of the...
- (ginkgos or czekanowskiales),
cycadophytes (cycads or bennettites), or
gnetophytes. This is
particularly useful for
extinct seed
plant groups whose systematic...
- The sporangia,
despite being recurved are
interpreted as terminal.
Gnetophytes produce both
compound pollen and seed strobili. C.Michael Hogan. 2010...
