American Trees On The Brink and The Species There With Them
When Americans think of endangered species we rarely think of trees. We think of birds such as the Ivory-billed Woodpecker or Spotted Owl, or maybe some fragile flower, crustacean or reptile. Even more familiar to most Americans are the animals that we have hunted and caused the demise of ourselves, such as buffalo, wolves and bears. All three of those we have tried to right our wrongs and reintroduced into their native habitat. Hopefully we have made those efforts because it was the right thing to do. Maybe it is just because we were able to see the damage we had done by no longer being able to reap the rewards of what we were destroying.
As people look at non-hunted species, sometimes they don’t see personal responsibility because they don’t kill them with their own hands. Sometimes people don’t realize that something else they are reaping may be what is causing the devastation to something that seems unrelated to them. Groups got really upset when people tried to protect the spotted owl by protecting the forests they inhabit. The argument what that individuals had a right to profit from the forests, and the trees that gave a home to the owls were needed to make a living. However while everyone focused on man vs. owl, they missed the forest for the trees. No one realized that before they were done arguing that debate the trees that provided that habitat would endangered as well, making both the man and the owl lose. Sometimes we have to realize that just because we have right to do something it isn’t necessarily the right thing to do.
The following is a list of American trees that have lost over 95% of their native habitat and are now considered endangered. These trees are actually being produced more in commercial production now than they are reproducing in their natural habitat. I wanted to bring this list to light not just to highlight some amazing trees. I wanted to highlight how they have gotten to the situation they are in, and the importance every being has to one another when it comes to sustainability.
Castanaea dentata (American Chestnut): This tree is one of the most known stories of eco-catastrophe in our countries history. The Chestnut was the most coveted of all lumbers in the early part of the 1900’s. As a result was the clear-cutting of almost all of the Southern Appalachians. The practices were horrid, and reminiscent of a scene from a slaughter house, but of trees. Lumber that wasn’t seen as fit to mill was left in place leaving entire mountains looking like salvage yards. Stumps were left in place, and all of the ground vegetation was smothered under the debris. Erosion was rampant, and as a result these wastelands became a breeding ground for what would become the Chestnut blight. Species such as the black bear were almost completely lost, deer populations dissipated, and without the nuts to forage or forest to find protection from hunters Elk eventually disappeared.
Today you can still find a few old growth American Chestnuts hiding away, but for the most part they have disappeared. They are definitely no longer a force in an ecosystem they once ruled. You can find sprouts coming up as under growth in poplar/oak forests, but the blight usually sets in once they reach about 2″ in caliper. This tree was once a staple of the forest. Its nuts fed almost every creature that roamed the forest floor, including humans. Today it is just trying to regain a footing. There are active breeding program at Universities throughout the Southeast trying to develop disease resistant varieties, but for now it remains on the brink.
Ulmus americana (American Elm): In the first half of the 1900’s this tree was the most common street tree in the United States. It’s arching branches formed cathedral ceilings over almost every street in every city. It become an icon of American urbanism and the America Beautiful movement. It fell victim not to greed of harvesting, or destruction of its environment, because this tree grew anywhere. Rather it fell victim to careless breeding and commercialization that weakened the species. While Chinese and European varieties were being imported for breeding to create fancy bark or brighter fall color, no one realized that they were weakening the species and importing a deadly disease that would bring the native species to its knees.
Today, on very rare occasions you will find an old native specimen, but almost always it will be diseased. For the most part this species is kept going in nurseries where young shoots are maintained as seed stock only to be hybridized with other varieties. Many of these hybridized varieties are wonderful and are contributing to the urban landscape in a positive way. Still, long lost, or at least hiding like a hermit in the remote corners of woods, is the majestic tree that once symbolized the industrial revolution, and the America Beautiful movement.
Pinus palustris (Longleaf Pine / Southern Yellow Pine): The Longleaf pine was on of the signature trees of Southeast coastal regions. This tree is very unique in that for the first eight years of its life it grows like a fireproof grass with no trunk elongation. Then it shoots up and it sensitive to burns, but once it reaches about 10′ it becomes fire proof again and soars to heights of up to 100′. This burning process is crucial to its reproduction and the culling of healthy forests. The lush wild look this process creates was the image that was burned into the minds of explorers when the new world was being discovered. The unique habit created by the juvenile plants provide habitat to all sorts of foul and wildlife and as their habitat has become endangered so have some of them. Red-cockaded woodpeckers and indigo snakes are most at risk, but tourtouses are in line right behind them.
The fate of this tree has been doomed by two demands. First and foremost the lumber industry. Only a small percentage of these trees make it from the grass stage, which is most prevalent, to the full grown tree form and mature species have been harvested at an unsustainable rate. Secondly it has suffered from development. Its native habitat starts at the first dry ground rising from coastal marshes and rises up to about 600′ in elevation. These are the prime development lands in coastal areas and as a result the first habitat taken to build homes and resorts. What is not built is often cleared for agriculture. The development has also led to fire control, and disrupted the natural growth and reproductive cycles of the species. One final negative effect on the ecosystem is that these habitats were the primary riparian buffer for water coming off of the Southern Appalachian and Ozark mountains. Along with their removal came the disappearance of lower level cold water streams, the silting and swamping of what were once fast moving rivers, and a host of other problems.
Quercus virginiana (Southern Live Oak): Yes, this tree is the one we have embedded in our heads from movies like Gone With the Wind, and every other great southern movie or novel. As we see them in all the urban settings and plantation gardens you would not think something this majestic could be in any sort of danger. The Spanish soss and fern growing on its branches make it look as thought this species is drooping from the weight or its virility. However, in its native habitat it is almost gone. The boggy soil and forests of the deltas where it thrived have mostly been drained for drilling, sugar cane, and development. These trees made up the buffers that used to protect New Orleans from the onslaught of hurricanes. There ability to be uprooted and fall apart but continue to grow in the loamy soil that was once its home was the constant stability that held the delta together. Now their native habitat is down to a few remaining national and state controlled forests. Of course other species have been impacted, but the most famous impact was the damage from Katrina that was exasperated without the natural buffers these trees created to protect it.
Tsuga hetrophylla (Western Hemlock) & Tsuga caroliniana (Carolina Hemlock): Both of these trees have suffered similar fates. Both are the victims of over logging. Unfortunately both were thought to be invincible as they grew like the Red Cedars of the Midwest on either coast. In the East the Carolina Hemlock was hardly ever used for lumber, They were usually casualties of careless Chestnut and Oak harvest and turned into pulp or used for fuel. By the time the species was decimated people had realized it was a beautiful lumber and turned to the bountiful west coast for the Western Hemlock in its place. Neither were able to come back as fast as they were being harvested and as a result the faster growing Tsuga canadensis (Canadian Hemlock) and various Pines have taken their respective places.
This has greatly changed the ecosystem of the forests elimating wildflowers and other shade tolerant plants that don’t tolerate the heavier shade of the pines. Also, these native varieties could fully develop as smaller sized trees in the shade of canopy trees. Whereas the Canadian Hemlock can grow in the shade but is naturally inclined to become more of a canopy tree. The Canadian version is also more prone to the woolly adelgid do to the flat placement of the needles compared to the rounder needle placement of the native varieties. Now the adelgid has set in, the Canadian Hemlock is dying at rates comparable to those of the Chestnut blight casualties. This has forever changed the ecosystem of all the warmer climate mountain forests where the adelgid thrives. Since the Hemlock also likes moist soils its decline is also increasing the light on mountain streams destroying native trout and salmonid habitat.
Picea sitchensis(Sitka Spruce): Another victim of logging, this species is also succumbing to the woolly adelgid. One of the more tragic consequences of this parable is that this tree is the home to the endangered Spotted Owl. When the fight over protecting the owl versus the right to harvest came to a head the harvest rate increased dramatically as it turned into a race to see how much people could harvest as while they still could. As timber containing adelgid infested lumber moves up and down the highways it just spreads it even more. In the end both the owl and the loggers are losing out as they are losing the tree they both covet so much.
Thuja plicata Western Red Cedar: This tree has been devastated in its native habitat due to logging for pulp. However, it is thriving and making a surge in cultivation. As the Hemlocks and Junipers used in landscapes have become more problematic and disease prone, this tree grows with relative ease. It struggles to outpace the pines that are moving into the native habitat because the Pines grow larger and shade them out. While in the landscape people are finding this to be a great native alternative to give the feel of a Canadian Hemlock without the adelgids or chemicals to keep the bugs at bay. However do to massive logging its natural disbursement patterns have been disrupted permanently and it may never be able to reestablish itself against the more aggressive species taking it’s place.
These trees are just a few that are becoming more and more endangered everyday. These trees I have chosen mainly because they have been in some way symbolic of American culture, have been a crucial part of the fabric of our forests, and have helped to convey the essence of the places we call home. The point of this article isn’t just to create awareness of a few trees, but also to make us realize that everything we do effects far more than us. As humans we have a capability that other species don’t: to make a conscious decision regarding an other’s fate.
The causes and the impacts I have discussed in this post are far from all that has contributed to or been a consequence of these changes. However with the ability to determine another being’s fate also comes the moral responsibility to do what is right for everyone and everything, not just ourselves. Also comes a responsibility to learn as much about the situations, plants, and creatures whose existence we can alter before we make an impact. Everyone makes mistakes unknowingly, but what determines the greatness of society or individual is how they use their abilities to correct or make amends for those mistakes and how what they use what they have learned moving forward. Hopefully this will create another ripple in that pool of awareness that we can all pass on.


Betula (Birch): Betula nigra (River Birch) is probably the most common. There are several varieties of the species including ‘heritage’. All have the indicative papery tan exfoliating bark. They also are usually multi-trunked with a few large leaders reaching for the warmth of the sun and small horizontal branches wisping out from the sides . The vertical structure of the trunk makes it move in the wind and provides a nice contrast to the broad, heavy and horizontal branching of Spruce and Pine. My favorite Birch is actually Betula populfolia ‘Whitespire” (Japanese Whitespire Birch). It is a white or “paper” barked variety that has proven to be borer resistant. The parent plant is now almost seventy-years old and remains borer free.
Cornus sericea (Red Twig Dogwood): This is one of the few shrubs with colorful bark in the winter. It is also native to much of the United States. This plant has a bright red twig in winter that can be seen from a distance but isn’t overpowering. The vertical branching habit makes it feel more like a grass or thicket plant than a shrub, but the fullness makes it work well for a border or foundation plant. The plants are a lush green in summer with a nice white flower and prolific white berries birds love. Along with this you must include Cornus alba (Variegated Red Twig Dogwood). It is very similar to Conus sericea, except it has a variegated leaf. This species can be prone to anthracnose but the variety Cornus alba “Ivory Halo” seems to be disease resistant, and keeps a more compact form than other varieties.
Hydrangea quercifolia (Oakleaf Hydrangea), and Hydrangea anomala var. petiolaris (Climbing Hydrangea): Both of these plants have a birch like bark that is exquisite in winter. The Oakleaf Hydrangea looks great against evergreens or lawns, and another interesting feature is that if you leave the flowers on they will dry in place all winter. This almost makes it look like it is in bloom. Climbing Hydrangea is wonderful on a fence, and especially brick walls. The bark really pops out against brick. It also has a very fibrous attaching root that give it an almost Gothic feel compared to other vines. It is also a self attaching vine with makes it even nicer.
Physocarpus opulifolius (Ninebark): There are two predominate varieties of this plant ‘Diablo’, a purple leaved variety, and ‘Dart’s Gold’a yellowish leaved variety. Both have a Birch like texture in winter. If left alone they grow very vertical and develop a thick trunk like structure. They seem to max out around six feet in height and four feet in width. This makes them great to tuck behind low growing evergreens and if left natural will look almost like a very small Birch. Ninebarks are extremely hardy, fairly fast growing, and drought tolerant.
Acer palmatum ‘Sangu Kaku’ (Coral Bark Maple): This plant his a vivid pinkish coral bark in winter. It can almost take on an orangish tone. The tree itself is very delicate and rarely exceeds twelve feet in height. It has a ferny maple leaf and wispy texture. It does not develop the distinguished branching habit that other Japanese Maples do, so it does look good as a stand alone specimen. However, it is fantastic tucked into evergreens or against a foundation. The only downfall to this plant is that it is prone to winter kill. Winter watering will cut down on this, but expect it to develop some dead wood in winter that will need to be removed in the spring.
Lagerstoemia indica (Crepe Myrtle): There are dozens of varieties of this plant in production. It comes in all sorts of colors and sizes. The trunks are usually clumped and have a blotchy exfoliating bark, rather than papery bark like a birch. Many people think of them as trashy because they drop flowers and seed pods constantly and sucker which makes them require pruning to keep nice trunks. Regardless, with all of that, it sure looks good most of the time and especially with its late summer bloom and winter bark. Both features shine at times when other plants are lackluster. On top of that it can survive the abuse of just about any parking lot in the south.
Acer griseum (Paper Bark Maple): This is a very underused and overlooked tree. It averages about 25-30 feet in height, so it can be used for shade on a patio, a specimen in the lawn without killing out the grass, or as an ornamental in a foundation planting. It is not overly showy. It doesn’t have an amazing flower or incredible fall color, but it is classy. The fall color is nice, and the foliage is very clean and green in the summer, but this plant is sought for the bark. It is a favorite of collectors. Sometimes I compare plant collectors to book collectors. If I were to compare it to a book you just had to have on your shelf it would be Catcher in The Rye. It is not a huge tree, but does she rextremely well written, reliable as a recommendation, full of inspiration and bound to create memories.
Platanus x acerifolia (London Plane Tree) and Platanus occidentalis (American Sycamore): These are two of the great majestic trees of urban parks everywhere. They are messy, and drop limbs, leaves, and seeds all of the time, but the mess is worth it. They are extremely hardy, pollution and drought tolerant, and capable of living in swamps. There is not much this plant can’t take, but what it gives is irreplaceable. The bark of the London Planetree exfoliates on the lower portions of the trunk. The American Sycamore is reversed and exfoliates on the upper trunk and branches. Both create very tall and open canopies making them ideal for street trees. As their branches cross the road they create the feeling of a nave. Given the space of a park, where they can be 100 feet from the next tree, they can form a cathedral unto themselves with branches hanging all the way to the ground 60-80′ wide. When it comes to habit, they can rival the grandest of any Oak, but what makes them stand our is that glorious white of the bark exploding in winter.
Burning Bush / Euonymous alatus This is one of the most popular fall color shrubs in production. It’s vivid red fall color gives it the name. It is tolerant of drought, ignorant pruning with gas shears extreme cold and keeps on growing. As a result it has become a favorite in commercial landscapes and roadside plantings. In zones 6 and up, the little red berry it gets is extremely viable and is spread by the birds that eat it. Typically a simple hedge planting in the wrong location can spread to a radius of one mile within ten years. The native plants they displace include Mountain Laurel, Rhododendron, and Hydrangea. Which would you rather have?
Bradford Pear / Pyrus calleryana I can remember when this plant came out in the 80’s and was marketed as “America’s Most Poplular Tree” for the fall color, spring flower, nice tight shape, hardiness, and its fruitlessness. Besides being prone to ice and wind damage due to that “desireable” branching habit, this tree turned out to be anything but fruitless. The small crabapple sized berries are a favorite of birds and so is its branching habit. As a result these can now be found in pastures and waterways throughout zones 6 and up. Even worse in waterways they are replacing canopy producing trees and raising water temperatures which hurts species such as the Southern Appalachian Brook Trout.
Japanese Wisteria / Wisteria floribunda Introduced as a favorite for Japanese gardens, its agreesive vining habit will take over anywhere zone 5 and below if left unattended. It can reproduce by rooting if the brances touch the ground, and in zones 7 and up has vibable seeds. It is commonly found in Eastern forests along the Blue Ridge Parkway at elevations between 2500 and 4000 feet. The populations are highest around cities and especially the Biltmore Estate. While the flowers are beautiful with the Dogwoods they can girdle and kill any tree they wrap around. There is a native variety that is finally making it into production.![spbua23[1] spbua23[1]](http://www.botanybuddy.com/blog/wp-content/uploads/2009/10/spbua231-300x201.jpg)
Japanese Barberry / Berberis thunbergii This plant is most commonly planted at your local McDonalds due to its attractiveness with the golden arches. It is just an invasive as the chain in zones five and up and is as bad for the environment as their food is for you. The plant aesthetically is probably as numbing to your palet as their food is to your culinary sophistication. The beautiful red berry entices the birds like a toy in a Happy Meal entices my child. The red leaves hypnotize the plant’s buyers from a distance like the arches that can be seen from a mile away. As a result this plant litters our forests like McDonalds’ wrappers do our cities.
Empress Tree / Paulownia tomentosa This plant is not commony found in nurseries, but it is pushed by many major seed catalogs for its ability to grow ten feet a year. I would think that would tell you something in itself, but people want instant results and that pretty purple flower in May and June. The tree has nice leaves and a habit like a Catalpa, but most of the year its appearance is cluttered by the seed pods that will spread anywhere they can find soil and light. This is one of the few invasive trees that wasn’t brought here for planting. Instead, before there were packing peanuts there were Paulownia! Before there was styrofoam the seed pods of this plant were used in wooded crates from Asia as packing peanuts, and the trees can now be found along all of the railways throughout the United States. Unfortunately one of the first places those rails went was our national parks.
English Ivy/ Hedera helix What would a formal garden be without it? It would be a lot more interesting and a lot more sustainable. It is defnitely time to give this plant a rest. It should really only be used in the concrete jungle and even then limited. There are many more intersting alternatives live Pachysandra or an all out perennial bed. This vine spreads by root and can climb in the forest greatly weakending larger trees if not contained. When allowed to reach heights of 20 and 30 feet it will often start to seed and spread even more. I haven’t used this plant in over five years, and to be honest with you, my designs, clients, and environment are far better off for it.
Butterfly Bush / Buddleia davidii This plant is finally starting to make people’s radar as an invasive. It is one of those that has exploded in variety and popularity over the last fifteen years. It is still new enough the effects are just starting to take root. However, in all zones, if these seed falls into a wetland or moist area and gets temperatures above seventy degrees for over a couple weeks, it will germiante and spread. It is most commonly a problem in warmer mountain and piedmont areas thought the US where moisture running off the mountains provides just this environment. The seed is a favorite of finches so they move the seed form the plant to summer wilflower patches that share ideal growing conditions.
Scotch Broom / Cytisus scoparius This plant is to the West and coastal areas what Japanese Spirea is to the rest of the country. It has naturalized throughout most of the West Coast. The low growing bushy habit takes out everything in its way, and it has beautiful flowers and evergreen foliage to boot! This makes it a favorite of growers. There are hundreds of varieties in production, and the tollerance to drought and long bloom time make it a favorite of retailers. As for all those little California and coastal wildflowers look out! This one is eating them all up.
Norway Maple / Acer platanoides This is probably the most planted invasive tree, but most unknown to be invasive. This plant had been quietly taking over Poplar forests for the last hundred years. Poplar being fast growing, straight and light is now the most popular trim lumber. It is often selectively harvested leaving just enough light for the seeds of the Norway Maple to germinate and establish quickly. With yellow fall color like a Poplar’s, from a distance youwould never know the forest had changed, but the natural progression of the forest has. As the Poplars get older, weaker ones are supposed to fall and thin over time allowing room for grand Oaks to establish along with the legacy surviors. However, the fast wide growing maples stunt the forest progression making 100 year old forests look like they are only thirty years old.

