Black pine is an evergreen tree species belonging to the pine family and the pine genus. The bark of young black pine trees is dark gray, while it becomes gray black when old, and the crown is hairless; Needle needles are dark green, shiny, and rough; Male bulbous flowers are light reddish brown, cylindrical in shape, while female bulbous flowers are upright with stems, oval in shape, light purple red or light brownish red; The cone fruit is green before maturity, brown when ripe, conical oval or ovoid in shape; Seeds are inverted oval shaped; The flowering period is from April to May. Black pine is named after its color, hence the name 'Black Pine'. Black pine is native to the coastal areas of Japan and southern Korea, while its origin in China lies in the coastal regions of Northeast and East China, as well as the introduction and cultivation areas of East and Central China.

Larch is a tree in the pine family, belonging to the genus Larch. Its bark is dark brown, and it splits vertically into scaly pieces that fall off; The young branches are covered in brown soft fur and gradually shed; The leaves are needle shaped and narrow in shape, with a slightly pointed or blunt tip and a slightly flat upper surface; The cone is broadly ovate or cylindrical ovate in shape, yellow brown when ripe, with scales in the middle that are ovate rectangular or ovate square in shape. The upper edge is wavy and significantly curved outward, with a flat and slightly concave tip. The back surface is covered with brown wart like protrusions or short coarse hairs; The scales of the bract are not exposed; Seeds are inverted oval in shape; The flowering period is from April to May, and the cones mature in October.