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Seed Plants I: seed plants without flowers - Coggle Diagram
Seed Plants I: seed plants without flowers
Lignophytes
a group of plants that gave rise to monophyletic group of woody plants.
Spermatophytes
the seed plants.
Manoxylic Wood
some plants produce a small amount of very soft, spongy parenchymatous wood.
Pycnoxylic Wood
the second suite consists of hard , strong wood with little parenchyma.
Gymnosperms
are those plants with "naked ovules" located on flat sporophylls.
Angiosperms
are the flowering plants those with carpels which are believed to be sporophylls that form tube-like closed structure.
Division Progymnospermophyta:
Progymnosperms
Progymnosperms
the third group to evolve form trimerophytes. these gave rise to conifers, cycads and the other gymnosperms.
Integument
a layer of tissue that surrounded the megasporangium that projected upward.
Micropyle
a hole in the integument that permitted the sperm cells to swim to the egg after the megaspore had developed into a megagametophyte.
Pollen Chamber
where microspores settle and act as a holding area.
Division Pteridospermophyta:
Seed Ferns
Seed Ferns
any woody plant with fern-like foliage that bore seeds instead of sori on its leaves.
Division Coniferophyta: conifers
Long Shoots
contain tiny papery leaves
Short Shoots
found in conifers axils produce familiar long needle leaves.
Simple Cones
pollen cones with a single short unbranched
Compound Cones
seed cones are more complex than pollen cones.
Cone Bracts
the short axis bears leaves.
Ovuliferous Scale
the axillary bud is microscopic and its megasporophylls are fused laterally.
Suspensor
some of the first cells elongate to push the other cells deep into the megagametophyte.
Proembryo
the other cells that are pushed deep into the megagametophyte..
Division Cycadophyta:
Cycads
short leaf plants less than 1 or 2 m tall.
Division Cycadophyta:
Cycadeoids
cycadeoids (all extinct had vegetative features almost identical to those of cycads.
Division Ginkgophyta:
Maidenhair Tree
contains a single living species, similar to a dicot tree with a stout trunk and many branches.
Division Gnetophyta
Anthophytes
gnetophytes and flowering plants constitute sister clades with a common ancestor.
