22 
LIGHT IN RELATION TO TREE GROWTH. 
INTERMEDIATE. 
Pseudotsuga taxifolia (Douglas fir). 
Pseudotsuga 
spruce). 
Macrocarpa 
(bigcone 
Abies amabilis (amabilis fir). 
Abies grandis (grand fir). 
Abies nobilis (noble fir). 
Chamecyparis 
cypress). 
nootkatensis 
(yellow 
Sequoia washingtoniana (bigtree). 
Pinus monticola (western white pine). 
EASTERN 
VERY TOLERANT. 
Chamecyparis 
white cedar). 
Abies balsamea (balsam fir). 
Abies fraseri (Fraser fir). 
Tsuga canadensis (hemlock). 
thyoides (southern 
TOLERANT. 
Picea canadensis (white spruce). 
Picea rubens (red spruce). 
Thuja occidentalis (northern white 
cedar). 
Fagus atropunicea (beech). 
Acer saccharum (sugar maple). 
Acer saccharinum (silver maple). 
Acer rubrum (red mapie). 
Nyssa sylvatica (black gum). 
Ulmus americana (white elm). 
Ulmus racemosa (cork elm). 
Tilia americana (basswood). 
Platanus occidentalis (sycamore). 
SPECIES. 
INTOLERANT. 
Pinus divaricata (jack pine). 
Pinus resinosa (red pine). 
Oxrydendrum arboreum (sourwood). 
Liriodendron tulipifera (tulip poplar). 
Q. rubra (red oak). 
Q. velutina (yellow oak and others). 
Betula papyrifera (paper birch). 
Liquidambar styracifiua (red gum). 
Hicoria alba (mockernut). 
Hicoria ovata (shagbark hickory). 
Hicoria pecan (pecan). 
VERY INTOLERANT. 
Pinus palustris (longleaf pine). 
Pinus echinata (shortleaf pine). 
Taxodium distichum (bald cypress). 
Lariz laricina (tamarack). 
Robinia pseudacacia (black locust). 
Salix (willows). 
Populus deltoides (cottonwood). 
Populus grandidentata (largetooth as- 
pen). 
INTERMEDIATS. 
Pinus taeda (loblolly pine). 
Pinus virginiana (scrub pine). 
Pinus rigida (pitch pine). 
Pinus strobus (white pine). 
Castanea dentata (chestnut). 
Quercus alba (white oak). 
Betula lenta (river birch). 
Betula tutea (yellow birch). 
Juglans nigra (black walnut). 
Magnolia tripetala (umbrella-tree). 
Magnolia acuminata (cucumber-tree). 
