Artemisia selengensis is a semi-shrubby herb of Artemisia in Compositae. Stems and branches are initially puberulent; The leaves are densely covered with gray-white velvety hairs at first; The lower and middle leaves of the stem are oblong, triangular or elliptic; The head is subglobose and pendulous; Achenes narrowly orbicular-ovoid or narrowly conical; The flowering and fruiting period is from August to October.

Artemisia selengensis is also known as Artemisia selengensis and Artemisia wannian. Distributed in Northeast China, North China and Tibet. Artemisia rupestris grows faster, growing from March to April in spring, flowering around August, bearing fruit around September, and gradually maturing after October.

Born on slopes, roadsides, scrub lands and forest grasslands in middle and low altitude areas, it often becomes the dominant species or main companion species of plant communities in some areas of sunny slopes in mountainous areas. Artemisia sphaerocephala has strong drought resistance, prefers warm weather, and has certain shade tolerance, which determines that it can be used as an important constructive species of grassland, widely distributed in summer green broad-leaved forest areas, and even grow under forests.

It is very common in forest grassland and typical grassland areas, and a small amount of it also enters forest and desert areas, but rarely enters Mongolian Plateau. It often grows on gravelly steep slopes and sunny slopes, and can also descend to the bottom of shallow ditches and the edge of dry river beds.

Growth habit of Pinus bungeana:

The active buds of Artemisia sphaerocephala are white or silvery gray, with a round top at first, and then they form prominent, blunt, with obvious degenerated scale leaves with a diameter of about .1 cm, which are produced after fruit, and most of them appear at the bifurcation between underground branches and roots; Most of the branches growing from the root neck are distributed at the junction of the root neck and the above-ground branches, especially at the base of branches, middle-aged branches near the root neck and the base of bifurcated branches.

After being buried in the soil, the branches that grow from the root neck can grow adventitious roots, and the top of some branches stops developing and becomes dormant, and the dormant buds are blunt, full, millet-shaped and light brown; Buds are more distributed on middle-aged branches, the remaining branches in the previous year are the last, and the distribution on the developing branches in that year is less. Death of branches promotes bud growth.

lignified branches grow at the base of Artemisia selengensis, and its main stem protrudes from the ground, and its base does not shoot branches. The old stem is dark brown, the root and neck outer skin is cork, longitudinally split and does not produce buds. Branches are formed from the top of root neck or buds go horizontally or grow downward first and then upward; There are dead branches at the base and upper part, and most of the branches in the current year are at the bifurcation of the base and upper part of the branches, and the new branches are purple. The basal branches develop outward from the base of middle-aged branches (covered by alluvium and can grow adventitious roots), showing obvious branch displacement.