Scientific Name: Zelkova serrata (Thunb) Makino
Classification: Japanese elm family
Distribution: Those inhibit in the south of Hwanghae-do, and are distributed in Japan, Taiwan and China.
Flower or Fruit: The flower is hermaphrodite and cyme, and comes out from the axil in April or May. The fruit is drupe and spheroid, and has ridges backward and ripen in October.

Scientific Name: Aster tataricus L. fil
Classification: Chrysanthemum family
Distribution: Those inhibit all over the country, and are distributed in Japan, Manchuria, China and Mongolia.
Flower or Fruit: The flower blooms between July and October, and is light purple and is corymbous on trunks and branch tips. The diameter of caput is between 2.5 and 3.3 centimeters, and the peduncle is between 1.5 and 5 centimeters. The involucre is hemisphere, and its bracts are arranged triply and are lanceolate. The fruit is achene and is obovate. The pappus is 6mm long.

Scientific Name: Acer mono Maxim
Classification: Maple family
Distribution: Those inhibit all over the country, and are distributed in Japan, Manchuria, China, Amur and Ussuri.
Flower or Fruit: The flower blooms between April and May, and is light yellow and is corymbous on new branches. The sepal and the petal are five respectively, and the stamen and the pistil are eight and one respectively. The fruit is samara and is 2 or 3 centimeters long, and is opened in an acute angle and ripens in October.

Scientific Name: Meehania urticifolia (Miquel) Makino
Classification: Self-heal family
Distribution: Those inhibit all over the country, and are distributed in Japan, Manchuria and China.
Flower or Fruit: The flower blooms in May and is purple. Two or six flowers come out from the upper axil. The calyx is fivefold, and the central lobation of the lower sprout is somewhat big and long and white ciliation is being around xylem. The lengths of stamens are same by twos, and the fruit is mericarp.

Scientific Name: Corydalis heterocarpa Sieb. et Zucc
Classification: Opium poppy family
Distribution: The north of Hwanghae and Gangwon, and Japan
Flower or Fruit: The flower is raceme on the tip of branch and trunk, and the peduncle is somewhat short and the bract is lanceolate. The spur comes out aside, and six stamens are divided into two groups. The fruit is capsule and is pinched like rosary. The seed is black and the columnar process is closely arranged in one line.