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Seed Plants 1: Seed Plants Without Flowers - Coggle Diagram
Seed Plants 1: Seed Plants Without Flowers
Concepts
Lignophytes
Monophyletic group of woody plants
Seed plants
Spermatophytes
Manoxylic wood
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Soft, spongy, parenchymatous wood
Pycnoxylic wood
Hard, strong with little parenchyma
Gymnosperms
Naked ovules
Ovules located on flat sporophylls
Angiosperms
Flowering plants
Division Progymnospermophyta: Progymnosperms
Third group to evolve from trimerophytes
Now extinct
Develop megaphyllous leaves
Evolution of vascular cambium
Aneurophtales
Shrubs to large trees
Vascular cambium
Little webbing between branches
Archaeopteridales
Trees up to 8.4 meters tall
Abundant wood and secondary phloem
Heterosporous
Evolution of Seeds
Integument
Surrounded megasporangium
Microphyle
Pollen chamber
Place where microspores settle
Division of Coniferophyta: Conifers
Diverse, moderate to gigantic size
Leaves
One or two large veins running down center
Scale shaped
Pines
Two types of shoot
Tiny papery leaves
Long shoots
Short shoots
Long needle leaves
Pollen and seed cones
Pollen cones are simple cones
Seed cones are more complex
Compound cones
Cone bracts
Short axis bears leaves
Ovuliferous scale
Division Cycadophyta: Cycads
Shoot trunks with pinnately compound leaves
Reach height of 18 meters
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Do not bear ovules
Produce seed and pollen cones
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