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Chapter 22: Seed Plants 1 (conifers (long shoots (tiny papery leaves),…
Chapter 22: Seed Plants 1
progymnosperms
conifers and cycads
aneurophytales
contains more relictual progymnosperms
archaeopteridales
more derived progymnosperm
evolution of seeds
integument
megasproangium surrounded by a layer of tissue
projected upward
micropyle
hole in the integument that permitted sperm to swim to egg
pollen chamber
holding area for pollen
conifers
long shoots
tiny papery leaves
short shoots
long needle leaves
simple cones
single short unbranched axis
compound cones
shoot with auxiliary buds
cone bracts
auxiliary bud that bears the megasporophylls
ovuliferous scale
megasporophylls are fused laterally
suspensor
pushes other cells deep into megagametophyte
proembryo
develop in the embryo