Plant Evolution time line By mememe Jun 3, 2010 Precamerbain Time. photosynthetic forms start to form. add oxygen to the atmosphere. Eukaryotes examlpe >> Algae Period: Jun 3, 2010 to Jun 13, 2010 Plant evolution Jun 4, 2010 Paleozoic Era periods: 1. Ordavovician and silurian period 2. Devonian period 3. Carboniferuos and Permain period Jun 5, 2010 Ordavivian and silurian period First land plant evolved from aquatic ancesetors. * Simple * Grew close to the ground in damp areas Jun 6, 2010 Devonian Period Some plants like ferns evovled. adapted to dry places Jun 7, 2010 Carboniferous and Permain Period Giant Ferns and other plants formed vast swampy forests. Jun 8, 2010 Mesozoic Era periods>> Triassic Cretaceous Jun 9, 2010 Triassic PEriod Cone-bearing Plants called Cycads Jun 10, 2010 Cretaceous Period Leafy trees Shrubs Small Flowing Plants Jun 11, 2010 Cenozoic Era Jun 12, 2010 Tertiary Period Grass and flowering plants evloved Jun 13, 2010 Quaternary Period After Ie age period water level is high and ther is more algae then any other plants through all the periods. most l=plants are still there that survived the ice age.