Originally at ZTUF and was supposed to also be at DG.
Alethopteris – A large tree-like seed-fern from the tropical and subtropical Carboniferous about 300 million years ago. (in-game: many locations, tropical rainforest, Jurassic, water placeable)
Aneurophyton – An early tree-fern (or progymnosperm) forming a small tree which has fern-like and conifer-like characteristics, from the Devonian about 380 million years ago. (in-game: many locations, coniferous forest, Triassic, water placeable)
Araucaria – Monkey Puzzles and similar conifers, forming large trees, from the Jurassic right through to the present day. (in-game: large Monkey Puzzle (Araucaria araucana) which matches the in-game tree, and tall, thin Araucaria columnaris (coral reef araucaria or Cook pine), Grassland, Cretaceous, water placeable)
Archeopteris - An early tree-fern (or progymnosperm) forming the first really large trees on Earth, which has fern-like and conifer-like characteristics, from the Devonian about 380 million years ago. (in-game: large and small, many locations, coniferous forest, Triassic, water placeable)
Bjuvia – A cycad-like conifer from the Permian about 280 million years ago, unusually for a conifer, having large simple (broad) leaves and large cones at the top, wider than they are long. (in-game: many locations, tropical rainforest, Jurassic, not water placeable)
Calamites – A horsetail the size of a large tree! (Modern horsetails are never more than 1 metre [3 feet] tall). From the Carboniferous about 300 million years ago. (in-game: large and small, many locations, coniferous forest, Jurassic, water placeable)
Chalonaria – a clubmoss forming an upright growth during the Carboniferous about 300 million years ago. (in-game: many locations, coniferous forest, Jurassic, water placeable)
Clevanodendron - a clubmoss forming an upright growth during the Devonian about 380 million years ago. (in-game: many locations, coniferous forest, Triassic, water placeable)
Cordaites – An extinct group of large conifer trees with large strap-shaped leaves found in Carboniferous wetlands about 300 million years ago. (in-game: large and very large, many locations, coniferous forest, Jurassic, large is water placeable, very large can be placed in tanks)
Cycadeoidea - A cycad-like conifer forming a shrub from the Cretaceous about 120 million years ago, unusually for a conifer, having flowers with coloured petals (here shown white) and large cones on the short trunk. (in-game: many locations, tropical rainforest, Cretaceous, water placeable)
Diaphorodendron – A clubmoss forming a vast and extraordinary looking tree! (Modern clubmosses are insignificant little plants no more than a few centimetres [inches] tall.) From the tropical and subtropical Carboniferous about 300 million years ago. Reproductive bodies at the top. (in-game: large – rootstock covers 4 in-game tiles, many locations, coniferous forest, Jurassic, water placeable)
Dicroidium - A seed-fern forming a small shrub, related to Glossopteris, from the Triassic about 220 million years ago. (in-game: many locations, deciduous forest, Triassic, water placeable)
Eospermatopteris – first of the tree-sized tree-ferns forming the first forests on Earth from the Devonian about 400 million years ago. (in-game: many locations, tropical rainforest, Triassic, water placeable)
Ginkgo (note spelling which is correct) – medium to large tree which is a broad-leaved deciduous conifer (honestly!). It is known as a fossil from the Permian, but was found over a 1000 years ago in its last wild haunts by Chinese monks, who cultivated it even after it became extinct in the wild. It was 'rediscovered' in 1691 by the German Engelbert Kaempfer. (in-game: many locations, deciduous forest, Cretaceous, water placeable, matches the in-game tree)
Glossopteris – A seed-fern growing to a large tree, from the Triassic about 220 million years ago. (in-game: many locations, deciduous forest, Triassic, water placeable, matches the in-game tree)
Lepidodendron – Another clubmoss forming a large tree. From the tropical and subtropical Carboniferous about 300 million years ago. Reproductive bodies at the tips of the shoots. The young plants are unbranched and look most peculiar. (in-game: young and very large as well as absolutely huge, many locations, coniferous forest, Jurassic, water placeable)
Lepidophloios – And another clubmoss forming a large tree. From the tropical and subtropical Carboniferous about 300 million years ago. Reproductive bodies along the branches. (in-game: many locations, coniferous forest, Jurassic, water placeable)
Medullosa – A large tree-like seed-fern plant from the tropical and subtropical Carboniferous about 300 million years ago. Seed-ferns were the first plants on Earth to bear seeds. (in-game: many locations, tropical rainforest, Jurassic, water placeable)
Pleuromeia - a clubmoss forming an upright growth during the Triassic about 220 million years ago. (in-game: many locations, coniferous forest, Triassic, water placeable)
Psaronius – An elegant tree-fern from the Permian about 280 million years ago. (in-game: many locations, tropical rainforest, Jurassic, water placeable)
Pseudosporochnus – A primitive tree-fern, forming a small Devonian tree about 400 million years ago. (in-game: many locations, tropical rainforest, Triassic, water placeable)
Sigillaria – Another clubmoss forming a huge tree of weird appearance. From the tropical and subtropical Carboniferous about 300 million years ago. Less branched than Lepidodendron and with bigger leaves. Reproductive bodies on the branches. (in-game: many locations, coniferous forest, Jurassic, water placeable)
Tempskya – For a plant biologist, this is the weirdest of a weird lot! It has what appears to be a tree trunk which is actually made up of clusters of roots and stems bundled together, and at intervals up it there are small bundles of fern leaves. It was found in the Cretaceous about 120 million years ago. (in-game: many locations, tropical rainforest, Cretaceous, water placeable)
Williamsonia - cycad-like conifer forming a small tree from the Cretaceous about 120 million years ago, unusually for a conifer, having flowers with coloured petals (here shown orange) and cones at the end of branches off the main trunk. (in-game: many locations, tropical rainforest, Cretaceous, water placeable)
Wollemia – Monkey puzzle-like conifer known only from fossils until it was found in a valley in Australia in 1994. For that reason I have made two versions of it, one for DD and the other as an Australian contemporary savannah plant. (in-game: Australian savannah, not water-placeable AND many locations, savannah, Cretaceous, water placeable)