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Seed Plants I (Division Progymnospermophyta (Aneurophytales (Relictual…
Seed Plants I
Division Progymnospermophyta
Aneurophytales
Relictual Progymnosperms
Aneurophyton
Protopteridium
Proteokalon
Tetraxylopteris
Triloboxylon
Eospermatopteris
Shrubs to Large Trees
Vascular Cambium
Secondary Growth
Primary Xylem
Archaeopteridales
Wood & Secondary Phloem
Trees up to 8.4 m tall
Fronds
Resemble fern leaves
Planted Branch Systems
Heterosporous Reproduction
Seeds not produced
Evolution of Seeds
Integument
Layer of Tissue
Surrounding Megasporangium
Projects Upwards
Micropyle
Hole in Integument
Permits Sperm Cells
Pollen Chamber
Holding Area
Where Microspores Settle
Division Pteridospermophyta
Pteridospermophyta
Seed Ferns
All Extinct
Cycadophyta
Cycads
Extant
Cycadeoidophyta
Cycadeoids
All Extinct
Division Coniferophyta
Conifers
Never Vines, Herbs, Annuals
Never Have Bulbs or Rhizomes
Leaves
Simple Needles or Scales
Perennial
One or Two Long Veins
Endodermis
Transfusion Tissue
Transfusion Parenchyma Cells
Transfusion Tracheids
Pines
Long Shoots
Short Shoots
Pollen Cones & Seed Cones
Pollen Cones
Simple Cones
Short Unbranched Axis
Seed Cones
Compound Cones
Shoot w/ Axillary Buds
Cone Bracts
Division Cycadophyta
Cycads
Short Plants
1-2 m tall
Bark Covered Trunk
Stems
Thick Cortex
Long, Wide Tracheids
Massive Rays
Foliage Leaves
No Ovules
Produce Seed Cones
Produce Pollen Cones
