Please enable JavaScript.
Coggle requires JavaScript to display documents.
Vascular Plants without Seeds, plant morphology, fern, evolution-plants,…
Vascular Plants without Seeds
The microphyll line of Evolution: Lycophytes
Morphology
such enations were large
member of genera Drepanophycus
presumed ancestor the zosterophyllophytes
Cambium cells may have stretched
hererospory
contain only five genera
lycopodium, phylloglossum, selaginella, isoetes and stylites
Sporangia are clustered together
compact group called cones and stobili
extent genera
Selaginella is less common
lycopodium ground pine or club moss
it is commonly from tropical regions to artic forest
all lycopodium species are homosporous
Early Vascular Plants
Rhyniophytes
contain large multicellular masses
had naked stem
upper rights stems were simple
short cylinders with no leaves
has equal dichotomous branching
fossils general character called rhyniophytes
Zosterophyllophytes
similar to rhyniophytes
named after genus Zosterophyllum
small herbs without secondary growth
sporangia were lateral
Not terminal
sporangia opened transversely
The mesophyll of evolution: euphyllophytes
#
ferns
mostly found in shady parts and lakeside
early ferns first appeared in devovian period
can be found in almost any habitat
found in hot and dry weather
Origin of megaphylls (Euphylls)
Megaphylls leaves that envolved from branch system
enations/ microphylls
leaves on gametophytes
Non vascular plants
Trimerophytes
Fossils are strongly resemble
proposed in 1968
three genera of extinct plants
considered a distinct advancement
out of rhyniophytes
Monilophytes
United by three synapomorphies
The term Vascular Cryptogams
#
reproduction is hidden
plants refer to vascular cryptogams
have vascular tissue
highly developed
They lack seeds
Xylem structure of early vascular plants
#
two types of xylem organization
Protostele where xylem
It is in center with no pith
But metaxylem is in the edge
Differential Connection
Functional Connection
Types Connection
