Life reconstruction of Caytonia nathorstii , showing the stem, leaves, ovuliferous organs, and seeds。Image source：Abbieeturner， CC BY-SA 4.0 Age Jurassic（Hettangian-Tithonian） 145-200 Ma Taxonomy Kingdom: Plantae Phylum: Pteridospermatophyta Class: Caytoniopsida Order: Caytoniales Family: Caytoniaceae Genus: Caytonia Species: Caytonia nathorstii Morphological description The ovuliferous organs of Caytonia nathorstii consist of numerous small, cup-shaped structures known

Reconstruction of Cooksonia pertoni （Courtesy of palaeopedia ） Age Silurian（Pridoli epoch）-Devonian（Lochkovian） 433-393 Ma Taxonomy Kingdom: Plantae Superphylum: Polysporangiomorpha Genus: Cooksonia Species: Cooksonia pertoni Morphological description Cooksonia pertoni is one of the most representative species of the extinct early land plant genus Cooksonia , a group of great importance in plant evolution, although it may not form a strictly monophyletic lineage. The species