Osmunda japonica Euphorbia japonica. Rhododendron, Ophiopogon japonicus. , wild grass, dog tooth grass, citrus rhubarb grass, Hosta, February flower, Parthenocissus quinquefolia. , silkworm, rhamnose. Ophiopogon japonicus Wait.
Negative-tolerant classification
Shade tolerance of seedlings is an important problem in afforestation. Japanese fir, beech, Shuke and Podocarpus have strong shade tolerance; Pine, larch and birch have weak shade tolerance; Oak, willow, maple and oak have moderate shade tolerance. Generally, tree species with strong shade tolerance (shade trees) receive at least a small amount of light to form a dense crown.
The leaf life of Japanese fir, Hokkaido spruce and other trees can be as long as several years or even more than 10 years, and only some leaves are replaced every year, so their shade tolerance is stronger than that of short-leaved trees. Herbs also have strong or weak shade tolerance, and those with weak shade tolerance are difficult to grow in the dark. In waters or forests, according to their height (depth), we can see the changes of shade tolerance order of various biological species.