Isoetes sinensis is a perennial swamp plant of Isoetes, with a plant height of 15-30 cm. The rhizome is fleshy and lumpy; Leaves clustered upward, mostly imbricate to the axis. The leaves are juicy, grassy, bright green and linear. Sporangium oval, about 9 mm long, about 3 mm in diameter, with white membranous cover; Macrosporangium is often born on the axial surface of the peripheral leaf base; The microsporangium is born on the axial surface of the inner leaf base, and there are many gray powdery bipartite microspores in it.

It mainly grows in shallow ponds, ponds and gully silt soil; The soil is rich in organic matter, with a pH value of 6-6.5. The main associated plants are Cynanchum japonicum, glutinous rice balls, Alternanthera philoxeroides, Coilia japonica, and Dactylis japonicus intestines. ?

Isoetes sinensis is considered as a giant panda in the plant kingdom, a living fossil that appeared hundreds of millions of years ago, and one of the first batch of more than 50 first-class protected wild plants in China. It is endemic to China and extremely endangered in relict plant, and has high academic research value.

Extended data

distribution range

This species is an endangered aquatic fern endemic to China. It is distributed in Jiangsu (Nanjing), Anhui (Xiuning, Tunxi and Dangtu) and Zhejiang (Hangzhou, Zhuji, Jiande and Lishui) in China.

Breeding method

The bud propagation method can be tried. During meristem propagation, the whole plant can be transplanted in a wet environment with roots, and appropriate water supply can be provided to avoid drought and excessive water depth, and at the same time, snails and other pests should be prevented. ?

Main value

Isoetes, the only surviving survivor of Isoetes, is classified as pseudopteridophyte, that is, pteridophyte with small leaves, but it is different from other members such as Lycopodium, Selaginella and Equisetum, and it is also different from the species with linear leaves and no complicated vein tissue. Therefore, it has certain research value in system evolution.

Baidu Encyclopedia-Isoetes sinensis