Pteridosperm
Pteridosperm
Several distinct polyphyletic groups of extinct seed-bearing plants.
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Readers' pathsAug 2026 – Oct 2026
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Komlopteris
Extinct genus of seed fern.
7.7%
Seed plant
Plants that reproduce with seeds.
7.6%
Lyginopteridales
Prehistoric plant order.
6.5%
Corystospermaceae
Extinct family of seed ferns.
5.4%
Calamopityaceae
Extinct family of Paleozoic plants.
5.1%
Czekanowskiales
Extinct order of plants.
4.9%
Gigantopterid
Extinct order of plants of the Permian period.
4.6%
Medullosales
Extinct order of Late Carboniferous seed ferns.
4.4%
Caytoniales
Extinct order of plants.
4.2%
Glossopteridales
Extinct order of seed ferns.
4.2%
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Vascular plant
Clade of plants with xylem and phloem.
16%
Devonian
Fourth period of the Paleozoic Era.
11%
Embryophyte
Subclade of green plants, also known as land plants.
11%
Coal forest
Land type during the late Carboniferous and Permian.
9.1%
Seed plant
Plants that reproduce with seeds.
9%
Carboniferous rainforest collapse
Extinction event at the end of the Moscovian in the Carboniferous.
4.7%
Gymnosperm
Clade of non-flowering, naked-seeded vascular plants.
3.8%
Seed
Reproductive structure in plants.
3.3%
Evolutionary history of plants
3.2%
Dicroidium
Extinct genus of corystosperm seed ferns.
3.1%