Corystospermaceae
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Corystosperms are a group of extinct seed plants belonging to the family Corystospermaceae assigned to the order Corystospermales or Umkomasiales. They were first described based on fossils collected
Bulgo Sandstone biota
Umkomasia macleanii ovulate structure from Umkomaas
Pteruchus africanus pollen structure from Umkomaas
Dicroidium odontopteroides leaf from Birds River
Seed plant
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A seed plant or spermatophyte, also called a phanerogam or a phaenogam, is any plant that produces seeds. It is a category of embryophyte that includes most of the familiar land plants, including the
Corystospermaceae
…Corystosperms are a group of extinct seed plants (often referred to as "seed ferns") belonging to the family Corystospermaceae (also called Umkomasiaceae) assigned to the order Corystospermales or…
Scots Pine Kristiansand, Norway 2021 08 10
Acer pseudoplatanus Chaltenbrunnen
Drawing of Runcaria megasporangium and cupule, resembling a seed without a solid seed coat
Reconstruction of the extinct order Bennettitales