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Seed plant 1: Gymnosperms - Coggle Diagram
Seed plant 1: Gymnosperms
progymnosperms
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aneurophytales
archaeopteridales
evolution of seeds
pteridospermophyta
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seed ferns
manoxylic
three-ribbed protostele
evolved from aneurophytales
coniferophyta
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conifers
approximately 50 genera and 550 species
leaf veins have an endodermis
transfusion parenchyma cells and tracheids
cycadophyta
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cycads
highly prized ornametals
cycadeoidophyta
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cycadeoids
have vegetative features
each ovule had a stalk
microsporophyll was cup shaped
contain microsporangia
ginkgophyta
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maidenhair tree
lacks vessels and axial parenchyma
cntains a single living species
have both long and short shoot
pairs at end if short stalk
gnetophyta
mostly vines or small shrubs with broad leaves
contains 3 groups of enigmatic plants
