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Lepidodendron is an extinct genus of primitive lycopodian vascular plants belonging the order Lepidodendrales.It is well preserved and common in the fossil record. Like other Lepidodendrales, species of Lepidodendron grew as large-tree-like plants in wetland coal forest environments.
As of September 2016, the International Union for Conservation of Nature (IUCN) lists 116 extinct species, 132 possibly extinct species, 35 extinct in the wild species, 13 possibly extinct in the wild species, five extinct subspecies, one extinct in the wild subspecies, and four extinct varieties of plant.
Archaeopteris is an extinct genus of progymnosperm tree with fern-like leaves. A useful index fossil , this tree is found in strata dating from the Upper Devonian to Lower Carboniferous ( 382 to 323 million years ago ), the oldest fossils being 385 million years old, [ 1 ] and had global distribution.
As of December 2023, the International Union for Conservation of Nature (IUCN) lists 45 Extinct in the Wild plant species. [1] Approximately 0.068% of all evaluated plant species are listed as extinct in the wild. The IUCN also lists one plant subspecies as extinct in the wild.
Lepidodendrales (from the Greek for "scale tree") or arborescent lycophytes are an extinct order of primitive, vascular, heterosporous, arborescent (tree-like) plants belonging to Lycopodiopsida. Members of Lepidodendrales are the best understood of the fossil lycopsids due to the vast diversity of Lepidodendrales specimens and the diversity in ...
It has been estimated that 137 plant, animal and insect species go extinct every day due to rainforest deforestation, which equates to 50,000 species a year. [224] Others state that tropical rainforest deforestation is contributing to the ongoing Holocene mass extinction.
Restoration Leaf scars are shown between the vertical sections of a Sigillaria where the leaves used to be attached. Sigillaria was a tree-like plant reaching a height up to 30 m (98 ft), [1] and lycopsids were capable to reach a height of up to 50 m (160 ft). [4]
While extinct in the wild, Encephalartos woodii specimens are found in many botanical gardens, institutions and collections around the world, with an estimated 500 individuals in existence, all clones of the original specimen. [2] [11] For an Encephalartos cycad, E. woodii is relatively fast-growing and vigorous in cultivation. [11]