大香网伊人久久综合网2020_97久久国产亚洲精品超碰热_久久香蕉国产视频_久久午夜福利无码1000合集

The Zhongshan Nature Reserve Management and Protection Center recently discovered about 20 Psilotum nudum plants, known as "the most primitive vascular plant", in downtown Zhongshan. This species has not been previously recorded in Zhongshan.

Psilotum nudum, or whisk fern, is a small fernlike plant. It is named for its pine-leaf shaped scale leaves. Its name "Psilotum nudum" means "bare naked" in Latin.

Psilotum nudum is described as a "living fossil" in the plant kingdom. It is generally believed to have first appeared in the Devonian period about 300 million years ago and is the most primitive species of vascular plants.