|
Division
|
Description
|
Nickname or Subgroup
|
Examples
|
Comments
|
Time Period
|
Peak
|
|
Angiospermae
|
Anthophyta
|
flowering, seed-bearing vascular plants
|
Monocots
|
grasses, grains, palms
|
parallel veins in leaves with silica
|
Tertiary - Now
|
Cenozoic (90% of plant species now)
|
|
Dicots / Eudicots
|
oaks, maples (Acer), roses, most vegetables
|
net-like veins in leaves
|
Cretaceous - Now
|
|
Gymnospermae
|
Coniferophyta
|
non-flowering, seed-bearing, vascular plants with cones
|
Conifers
|
pines, fir, spruces, Metasequoia
(Cretaceous to Now)
|
Araucaria in Petrified Forest
|
Carboniferous - Now
|
Mesozoic
|
|
Ginkgophyta
|
Ginkgo
|
Ginkgo
|
Only one species still alive
|
Jurassic - Now
|
Jurassic
|
|
Cycadophyta
|
Cycads, sago palms
|
Cycads, Seed Ferns (extinct)
|
Few still live in tropical areas
|
Permian - Now
|
Mesozoic
|
|
Pteridospermae
|
Pteridospermaphyta
|
Seed Ferns
|
Extinct Glossopteris key to Gondwana in Permian only
|
fern-like foliage; Extinct
|
Devonian – Cretaceous
|
Permian
|
|
RED = EXTINCT Horsetails – Annularia/Calamites (Devonian to Now)
Lepidodendron (Carboniferous – Index Fossil)
Glossopteris (Permian only – Index Fossil)
Metasequoia (Cretaceous to Now)
Ginkgo (Jurassic to Now)
Acer (Tertiary to Now)
of
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Yüklə 0.62 Mb.
