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vascular plants without seeds - Coggle Diagram
vascular plants without seeds
early vascular plants
rhyniophytes
upright stems
short cylinders
no leaves
equal dichotomous branching
are homosporous
zosterophyllophtes
lateral sporangia
sporangia opened transversely
lycophytes
heterospory
cones and strobili together
lepidostrobus
lepidophloios
morphology
extant genera
lycopodium
herbs with prostate rhizomes
true roots and short upright brances
secondary growth never occurs
homosporous
selaginella
heterosporous
ligules on leaves
isoetes
heterosporous
microphylls have ligules
small corm like stems with roots
euphyllophytes
trimerophytes
origin of megaphylls
monilophytes
equisetophytes
ferns
sporophyte is single axis that bears both true roots and megaphyllous leaves
endarch siphonostele
leaf gap
vascular cryptograms
