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Seed Plants II: Angiosperms Screen Shot 2020-12-03 at 8.19.04 PM - Coggle…
Seed Plants II: Angiosperms Screen Shot 2020-12-03 at 8.19.04 PM
Basal Angiosperms
groups that originated
while angiosperms
a young clade
ancestors reproductively isolated
before distinctive angiosperm
traits originated
three groups of extant descendants
Nymphaeaceae
Water lillies
Austrobaileyales
Amborellaceae
uniaperturate
Changing Concepts About Early Angiosperms
ranalean flower
magnolia-type flower
generalized
most botanist
concluded
angiosperm are
monophyletic
erronoeous hypothesis
original misidentification
oldest wood
seem to be from
Aptian Epoch of Japan
Classification of Flowering Plants
#
Monocots
Commelinoid Monocots
Arecales
Poales
Zingiberales
gynoecia
composed of
several carpels (usually 3)
perianth
3 outer member
3 inner member
tepals
#
leaves
long, strap-shaped
flowers
three parts
numerous vascular bundles in the stem
no ordinary secondary growth.
parallel leaf venation
Alismatale
aquatic herbs
found in
swamps or marshes
partly submerges
Members of Alismataceae
less highly modified
large leaves
thick cuticle
on leaf epidermis
entirely submerges
sea grasses
no transpiration
air chambers
makes plants
buoyant
Liliales
petaloid monocot
large colorful floewers
11 families
1,300 species
unusual member
Smilacaceae
presence of spots
or
lines on the petals
Asparagales
carpels fuse
side by side
starting at the bases
septa
septal nectaries
Bulbs, rhizomes, and corms
Dioscoreales
Yams
Eudicots
Rosid Clade
Asterid Clade
Basal Eudicots
leaves
not strap-shaped
reticulate leaf venation
flowers
4 or 5 parts
pollen grain have
three germination pores (tricolpate)
or
have some condition derived from the tricolpate mechanism
Angiosperms
Greatest no. of
living species
257,000
Magnoliophyta
monophyletic
most advanced
peak of
plant evolution
named for
having flowers
significant synapomorphy
angiosperm carpels
closed carpels
double fertilization
universal
