316 



ANNUAL REPORT SMITHSONIAN INSTITUTION, 1953 



The following species have been investigated in studies on rights- 

 of-way and other nonforest vegetation types. The list includes 

 only those seen in sufficient abundance to permit an estimate of their 

 vegetational status. 



Pinus strohus (white pine) 

 Pinus palustris (longleaf pine) 

 Pinus carihaea (slash pine) 

 Pinus taeda (loblolly pine) 

 Pinus rigida (pitch pine) 

 Pinus echinata (shortleaf pine) 

 Pinus virginiana (scrub pine) 

 Larix laricina (tamarack) 

 Picea mariana (black spruce) 

 Picea rul)cns (red spruce) 

 Tsuga canadensis (hemlock) 

 AMes balsamea (balsam fir) 

 Taxodium distichum (bald cypress) 

 Taxodium ascendens (pond cypress) 

 Thuja Occident alls (white cedar) 

 Juniperus virginiana (red cedar) 

 Popuins tremuloides (quaking aspen) 

 Populus grandidentata (bigtooth aspen) 

 Populus balsamifera (balsam popular) 

 Populus deltoides (eastern cottonwood) 

 SaUx nigra (black willow) 

 Juglans cinerea (butternut) 

 Juglans nigra (black walnut) 

 Gary a cordiformis (bitternut) 

 Carya ovata (shagbark hickory) 

 Gary a glabra (pignut hickory) 

 Garpinus caroliniana (blue beech) 

 Ostrya virginiana (hop hornbeam) 

 Betula lenta (black birch) 

 Betula lutea (yellow birch) 

 Betula nigra (river birch) 

 Betula populifoUa (gray birch) 

 Betula papyrifera (paper birch) 

 Fagus grandifolia (beech) 

 Quercus borealis (northern red oak) 

 Quercus coccinea (scarlet oak) 

 Quercus velutina (black oak) 

 Quercus laevis (turkey oak) 

 Quercus falcata (southern red oak) 

 Quercus marilandica (blackjack oak) 

 Quercus nigra (water oak) 



In right-of-way vegetation management, trees are of significance 

 in two respects. First are the trees that are already there and that 

 must sooner or later be root-killed. These include not only the 

 large and obvious sprouts and suckers, but also a vast number of small 

 shoots a foot high and less. Such shoots have customarily passed. 



Quercus phellos (willow oak) 

 Quercus cinerea (bluejack oak) 

 Quercus virginiana (live oak) 

 Quercus stellata (post oak) 

 Quercus alba (white oak) 

 Quercus prinus (chestnut oak) 

 Ulmus americana (American elm) 

 Ulmus alata (winged elm) 

 Ulmus rubra (slippery elm) 

 Geltis occidentalis (hackberry) 

 Morus rubra (red mulberry) 

 Magnolia acuminata (cucumber tree) 

 Magnolia virginiana (sweet bay) 

 Magnolia tripetala (umbrella tree) 

 Liriodendron tulipifera (tulip tree) 

 Persea palustris (swamp bay) 

 Sassafras albidum (sassafras) 

 Liguidambar styracifiua (red gum) 

 Platanus occidentalis (sycamore) 

 Malus pumila (apple) 

 Amelanchier spp. (tree shadbushes) 

 Crataegus spp. (hawthorns) 

 Primus pcnnsylvariica (pin cherry) 

 Prunus serotinu (black cherry) 

 Gleditsia triacanthos (honey locust) 

 Robinia pseudoacacia (black locust) 

 Ailanthus altissima (ailanthus) 

 Acer saccharum (sugar maple) 

 Acer saccharinum (silver maple) 

 Acerrubrum (red maple) 

 Acer negundo (box-elder) 

 Tilia americana (basswood) 

 Nyssa sylvatica (black gum) 

 Nyssa aquatica (tupelo gum) 

 Oxydendrum arboreum (sourwood) 

 Diospyros virginiana (persimmon) 

 Fraximis americana (white ash) 

 Fraxinus pennsylvanica (red and green 



ashes) 

 Fraxinus nigra (black ash) 



