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Seed Plants I (Concepts (gymnosperms ("naked ovules", ovules…
Seed Plants I
Concepts
lignophytes
woody plants
spermatophytes
seed plants
manoxylic wood
soft, spongy, parenchymatous wood
pycnoxylic wood
strong wood with little parenchyma
gymnosperms
"naked ovules"
ovules located on flat sporophylls
angiosperm
flowering plants
Progymnosperms
progymnosperms
evolved from trimerophytes
now extinct
integument
layer of tissue around megasporangium
micropyle
hole that permits the sperm to swim to egg
pollen chamber
holding area
:
Conifers
#
ovuliferous scale
megasporophylls are fused laterally
suspensor
pushes cells into megagametophyte
proembryo
develop into the embryo
Gnetophyta
