This plant looks like a fern with alternate leaves. What is this?

Fern (English name: fern) is the general name of Devonian low-lying woody plants. They need water as part of the regeneration cycle, and since then, they have derived various species, which is a plant with strong vitality. Pteridophytes have an alternate life history and consist of two groups of gametophytes and one group of gametophytes. The gametophyte is a free organ. There are about 12000 species of pteridophytes, which are widely distributed all over the world, especially in tropical and subtropical regions. There are 6 1 families, 223 genera and about 2,600 species in China, mainly distributed in South China and Southwest China. There are more than 1000 species in Yunnan province alone, so it is called "Pteridophyte Kingdom" in China.