It is a picture of the plant observation party I went in Shiroyama. On 2 December 2000, I took it at the athletics field of Fukuoka University of Education. Although it is an ordinary picture, please pay attention not to the person here but the Shiroyama in the background here. Several kinds of forests are shown. Why can you tell the type of forest just by looking from far away? This is because trees that make forest have characteristics of each kind.

Trees are distinguished into evergreen trees and deciduous trees with leaf life spans, broadleaf trees and conifers in the form of leaves, tall trees and shrubs in size (height). When these are combined, evergreen broad-leaved trees are said to be evergreen broad-leaved trees, cherry is deciduous broad-leaved trees, and cedar is evergreen needle-leaved trees.

A tree can be divided into a trunk part and a branch and leaf part (crown, ju kan), but also in the form of a crown, the type of the tree can be roughly discerned. Hemispherical type is a tree type which is often found in hardwood species, conical type is a tree type which is often found in conifer species. Besides this there are types like shrues, bamboo pines and pines. The difference in tree shape is due to how the branch attaches to the trunk.

Leaf color changes with the season. In evergreens (shinnosuki) with a leaf life span of 1 year or more, yellow leaves → green and dark green, leaf longevity in deciduous trees (Hazenoki) with a few months, yellowish green → green → yellow and red after falling leaves I will. In the meantime, if the flowers bloom, evergreens (Shinoki) and deciduous trees (Yamazakura) are more rich in color change. Even in evergreen trees, old leaves fall when fresh green.

If you look at Shiroyama once again with features such as the shape, color and size of the tree, the following forests will be distinguished. The name of the forest is represented by the plant name which is the most there.