Fern is also called fern

Fern is also called fern. In the Paleozoic Era, the scale woods and reeds in ferns were very tall and were important raw materials for coal formation. Except for the only surviving Alsophila spinulosa in the world, which is woody, the ferns that survive in modern times are all herbs. Ferns have no flowers, fruits or seeds, and reproduce by spores. It can be roughly divided into four classes: pine leaf fern, stone pine, horsetail (the above are pseudo-ferns) and true ferns (true ferns).




The underground stems of ferns can grow leaves everywhere every year. The upper part of the young leaves are curled, and the outside is covered with white hairs. In ancient times, it was called "fist dish" or "fern fist". The leaves gradually grow up, and there are dark green and beautiful pinnate compound leaves on the petiole. Ferns in the wild in the mountains are simple and strong, mainly relying on the brown or yellow spores on the back of their leaves scattered in damp places. After a complicated process, they develop into new ferns.