Please enable JavaScript.
Coggle requires JavaScript to display documents.
Vascular Plants Without Seeds (The Megaphyll Line of Evolution:…
Vascular Plants Without Seeds
Early Vascular Plants
Rhyniophytes
Equal dichotomous branching
branches of equal size and vigor
Rhyniophytes
homosporous
Protostele
Endarch Protostele
protoxylem in center
Exarch Protostele
metaxylem in center
Siphonostele
pith is center
Seed Plants
#
Zosterophyllophytes
Enations
Outgrows on the surface appearing like thin scales
The Microphyll Line of Evolution: Lycophytes
Morphology
Microphylls
increased photosynthesis
Heterospory
Cones
Strobili
Extant Genera
Ligule
#
small flap of tissue on upper surface of Selaginella leaves
The Megaphyll Line of Evolution: Euphyllophytes
Trimerophytes
Overtopping
one stem grows more vigorous than other
Pseudomonopodial branching
single main trunk
#
Origin of Megaphylls(Euphylls)
Megaphylls
Leaves evolved from branch systems
Telome theory
Telomes
ultimate twigs
Sporophyll
Euphyllophytes
Monilophytes
Euphyllophytes
Monilophytes
Lignophytes
Equisetophytes
Horsetails(Scouring Rushes)
Sporangiophore
Monopodial Growth
Ferns
Leptosporangiate ferns
Leaf Trace
Leaf Gap
Sori(sorus)
Eusporangium
Leptosporangia
The Term "Vascular Cryptograms"
Vascular Cryptogams(Ferns and fern allies)
have vascular tissure
reproduction hidden due to seed lackage
Lack: seeds, flowers, fruits
Small herbs w/o secondary growth
