Please enable JavaScript.
Coggle requires JavaScript to display documents.
Seed Plants II : Angiosperms (Concepts (Angiosperm carpels (Closed Carpels…
Seed Plants II : Angiosperms
Concepts
Magnoliophyta
most advanced group of plants
Angiosperm carpels
The edges of sporophyll primordia crowd against each other and grow shut.
Closed Carpels
develops into a fruit.
Double fertilization
the second sperm cell of the pollen tube fuses with the polar nuclei of the megagametophyte, producing the endosperm nucleus.
Primitively vesselless
their ancestors lacked vessels so they also lack vessels.
Pistil
fusion of the carpels into one structure.
Sympetally
fusion of petals into one structure.
Zygomorphy
flowers that are bilaterally symmetrical.
Changing concepts about Early Angiosperms
Catkins of pecan ; the axis bears many flowers, all with stamens but not carpels.
A flower of Magnolia is considered the typical ranalean flower.
Classification of Flowering Plants
Monocots or eudicots
Monocots has only one cotyledons
Eudicots has two cotyledons
Basal angiosperms
The early angiosperms diverged into several clades called basal angiosperms.
Basal angiosperms
water lilies
Flowers have numerous sepals, stamens with all parts arranged in spirals like the leaves of the rosette plants
Amborella
Monocot flowers would be dervied from an ancestral flower like this by mutations that result in only three or six of each type of floral appendage.
Monocots
the perinath members are called tepals.
Alismatales
most often found in swamps and marshes.
monocots are believed to have originated as semiaquatic plants that inhabited swapms and marshes.
leaf may have consist of a leaf base and petiole.
Liliales
presence of spots or lines on the petals.
Asparagales
carpels fuse side by side starting at their bases.
the fuses side called septa
septal nectaries are the open area which secretes nectar.
Dioscoreales
Commelinoid Monocots
Arecales
palms
Poales
Typha
Zingiberales
Canna lilies
Eudicots
Basal eudicots
Poppies
produce water- soluble pigments called betalains
nucleus cells proliferate and form a nutritive tissue called perisperm.
Santalales
Rosid Clade
Fabids
malvids
Asterid clade
have iridoid compounds
lamiids
campanulids
