Seed plants II: Angiosperm (monocots (Dioscoreales (small order that has…
Seed plants II: Angiosperm
changing concepts about early angiosperm
evolved in parallel with the gymnosperms.
angiosperm are monophyletic.
Angiosperms did not evolve from gymnosperms.
rich new fossils beds are yielding many new specimens of early angiosperm.
all organisms evolve, so did the basal angiosperm.
broad group of the most primitive flowering plants
contains living descendants of several groups originated while angiosperm were young clade.
mostly woody plants that produce seeds and flowers
classification of flowering plants
monocots and eudicots
flowering plant begin to follow two distinct line of evolution.
early angiosperm diverged into several clades called basal angiosperm
all species have small leaves, expanded.
leaves of plants occur near shoot apex.
includes food like wheat,corn,bamboo,sugarcane.
grasses are wind polinated, sepal and petal are important.
plat grow on the heavy shade of jungle.
almost all tropical, most are soft, nonleathery herb.
"Petaloid"monocot those with large, colorful flowers.
presence of spots or lines on the petals
found on swamps and marshes, partially or entirely submerged.
plant don't waste carbon and energy making fiber that is not needed
lack ordinary secondary growth and wood.
large clade with many families,species and types of biology.
Orchidaceae is the largest and most diverse family.
small order that has only one family.
yams, produces from this family.
has petiole,broad leaves with reticulate venation
contains small endosperm inside the cell.
small group have few members but great economic significance.
presence of pinnately compound leaves.
consist of several small order and two big groups.
lacks specialized chemicals found in other clades.
chemicals on them irritants the human skin too.
extremely important medicinally.
Eudicots base has lineages show some ancestral characteristics; Basal Eudicots.
numerous stamens, separate carpels
form a monophyletic group.
produce a group of water-soluble pigments.
Endosperm develops little, and then fails to continue growing.
small order of highly modified plants, parasitic.
contains the large endosperm inside the cell