What plants have disappeared from ours?

1. Cooksonia – This plant is considered the oldest representative of the flora on our planet. It grew on Earth over 400,000,000 years ago. The height did not exceed a few centimeters, the plant was the first living organism to have a stem. Reproduction took place with spores, which were located in ball-like processes at the end of the stems. There is an assumption that this plant was under water, due to the fact that no roots were found on it.
The oldest fossils are found in Ireland. Their age is 425 million years.
2. Prototaxite (Prototaxites) – a gigantic fossil mushroom, reaching more than 2 meters in girth at the base and a meter at the end. The mushroom was a conical, strongly elongated body. The nature of the feeding of prototaxites is a mystery to scientists. The soil was not yet formed at that time. Probably, dead remains of plants and other prototaxites were the substrate for the mushroom king. Modern mushrooms live in about the same way on rotten stumps and trees; it is difficult to say why they became extinct. This is probably to blame for the changed climate, because of which some animals and plants were forced to eat this mushroom.
3. Psanorius (Psaronius) is a genus of tree ferns. It was widely distributed on all continents. The height of the trunk reached 10 m, and the diameter – 1 m. At the top, there was a crown of 4-5 pinnately dissected leaves. The stem was surrounded by a leafy-root sheath. An unusual feature is that psaronium did not have a true stem, but it had a massive root mantle formed by hundreds of roots. These roots are called random because they appear in an atypical place.