- hypothesis,
which held that
gnetophytes were
sister to the
flowering plants. In the
gnetifer hypothesis, the
gnetophytes are
sister to the conifers, and...
-
includes the
gnetophytes, cycads, ginkgo, and conifers.
Older morphological studies believed in a
close relationship between the
gnetophytes and the angiosperms...
- thin,
biseriate (two cell-layer)
integument of
gnetophytes.
Bennettitaleans also lack
another gnetophyte-like trait: a
sheath of
fused bracteoles enveloping...
- of seed-producing
plants that
include conifers, cycads, Ginkgo, and
gnetophytes,
forming the
clade Gymno****e. The term
gymnosperm comes from the composite...
- this
event has been do****ented in both
Ephedra and Gnetum, a
subset of
gnetophytes. In
Ephedra nevadensis, a
single binucleate sperm cell is
deposited into...
- 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...
- conifers,
which have
simple pollen strobili and
compound seed strobili,
gnetophytes have both
compound pollen and seed strobili. The seed
strobili of Ephedra...
- and
leaves of the plant).
Gymnosperm seedlings also have cotyledons.
Gnetophytes, cycads, and
ginkgos all have 2,
whereas in
conifers they are
often variable...
- ****tophytes (seed plants)
Cycadophyta Cycads 160
Ginkgophyta Ginkgo 1
Pinophyta Conifers 630
Gnetophyta Gnetophytes 70 Angio****e
Flowering plants 258650...
-
placement of
Gnetophytes,
which have been
traditionally excluded from the conifers,
though recent molecular evidence suggest gnetophytes are the sister...
