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Chapter 22: Seed Plants 1: Plants Without Flowers (Gymnosperms) (Division…
Chapter 22: Seed Plants 1: Plants Without Flowers (Gymnosperms)
Concepts
Gymnosperms
Plants with naked ovules likes pine codes
Angiosperms
Flowering plants
Division of Pteridosperophyta: Seed Ferns
Appeared in Upper Devonian Period, woody plant with fern line foliage that bore seeds
Division Cycadophyta: Cycads
Confused with ferns, these have stout trunks with pinnately compound leaves and similar to seed ferns internally
Division Ginkgophyta: Maidenhair Tree
Division containing one living species because it lacks vessels and axial parenchyma
Division Cycadeoidophyta: Cyadeoids
Differs from Cycads only through stomatal complexes and leaf trace organization
Division Coniferophyta: Conifers
Perennial large trees that only ever produce leaves with simple needles or scales
Division Gnetophyta
Vines or small shrubs with broad leaves
Division Progymnospermophyta: Progymnosperms
Archeaopteridales
Trees with abundant wood and secondary phloem
Evolution of Seeds
Aneurophytales
An order of shrubs/trees resembles trimerophytes
