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Seed Plants 1 : Seed Plants Without Flowers (Gymnosperms) (Division…
Seed Plants 1 : Seed Plants Without Flowers (Gymnosperms)
Division Progymnospermophyta
Archaeopteridales
Aneurophytales
Evolution of Seeds
integument
micropyle
pollen chamber (microspores settle)
Division Gnetophyta
ephedra
welwitschia mirabilis
gnetum
Division Ginkophyta
Maidenhair tree
have both long and short shoots
ovules are large
develop a 3-layered seed coat
Division Coniferophyta
simple cones
compound cones
cone bracts
ovuliferous scale
Division Pteridospermophyta
seed ferns
