it’s what vines do.
takes a licking, keeps on ticking.
They say that companies that contract with our City are bound by tree protection guidelines. We will watch a few trees. See how that goes…
The John S. White House at 854 Locust Avenue was built by the prominent real estate lawyer and postmaster John S. White in 1903, just after he purchased the land from G. R. B. Michie. White was in business with William F. Long, for whom Long Street was eventually named. In 1910, White lived in the house with his wife, an infant son, his single brother-in-law, and two female African American servants who acted as nurse and cook, respectively.
Set far back from the street on a large lot and shaded by mature trees, this two-story, two-bay, house … has a hipped roof and is constructed of brick laid in common bond and painted. The north bay of the facade projects slightly and has a full pediment filled in with fish scale shingles; a hipped-roof, semi-hexagonal bay is attached to the north elevation; and a two-story, hipped-roof, two-bay addition is attached to the south elevation, set back from the facade and facing the street. A hipped-roof porch with slender Tuscan columns shades the recessed south bay and abuts the north bay of the facade. The south bay features the double glass doorway and a two-light transom. The 2nd floor of the south bay has a pair of narrow one/onesash
windows. The north bay features a single two/two-sash window on the 1st floor and a narrower one/one-sash window on the second. All of the windows have louvered shutters. The fully pedimented gable of the north bay retains the overhanging eave and cornice that characterizes the rest of the building, is filled in with wooden fish scale shingles, and has a small fanlight at its center. The roofs of both the porch and the house itself are covered in asphalt shingles. A modern, wooden ramp leads to the front entrance from the north side of the house. A one-story kitchen wing and a back porch are attached to the rear of the house.– (excerpted from the Martha Jefferson Historic District National Register of Historic Places registration form authored by Lydia Mattice Brandt PhD)
It is an evergreen climbing plant, growing to 20–30 m high where suitable surfaces (trees, cliffs, walls) are available, and also growing as ground cover where there are no vertical surfaces. It climbs by means of aerial rootlets with matted pads which cling strongly to the substrate.–Wikipedia
Lots of ivy in CHO. UVA is smart, they keep it off their buildings.
In the United States, H. helix is considered weedy or invasive in a number of regions and is on the official noxious weed lists in Oregon and Washington. Like other invasive vines such as kudzu, H. helix can grow to choke out other plants and create “ivy deserts”. State and county sponsored efforts are encouraging the destruction of ivy in forests of the Pacific Northwest and the Southern United States. Its sale or import is banned in Oregon. Ivy can easily escape from cultivated gardens and invade nearby parks, forests and other natural areas. Ivy can climb into the canopy of trees in such density that the trees fall over from the weight, a problem which does not normally occur in its native range.For this reason, it is especially important to remove ivy from trees, creating “survival rings”. In its mature form, dense ivy can destroy habitat for native wildlife and creates large sections of solid ivy where no other plants can develop.
By JIM ROBBINS
TREES are on the front lines of our changing climate. And when the oldest trees in the world suddenly start dying, it’s time to pay attention.
North America’s ancient alpine bristlecone forests are falling victim to a voracious beetle and an Asian fungus. In Texas, a prolonged drought killed more than five million urban shade trees last year and an additional half-billion trees in parks and forests. In the Amazon, two severe droughts have killed billions more.
The common factor has been hotter, drier weather.
We have underestimated the importance of trees. They are not merely pleasant sources of shade but a potentially major answer to some of our most pressing environmental problems. We take them for granted, but they are a near miracle. In a bit of natural alchemy called photosynthesis, for example, trees turn one of the seemingly most insubstantial things of all — sunlight — into food for insects, wildlife and people, and use it to create shade, beauty and wood for fuel, furniture and homes.
For all of that, the unbroken forest that once covered much of the continent is now shot through with holes.
Humans have cut down the biggest and best trees and left the runts behind. What does that mean for the genetic fitness of our forests? No one knows for sure, for trees and forests are poorly understood on almost all levels. “It’s embarrassing how little we know,” one eminent redwood researcher told me.
What we do know, however, suggests that what trees do is essential though often not obvious. Decades ago, Katsuhiko Matsunaga, a marine chemist at Hokkaido University in Japan, discovered that when tree leaves decompose, they leach acids into the ocean that help fertilize plankton. When plankton thrive, so does the rest of the food chain. In a campaign called Forests Are Lovers of the Sea, fishermen have replanted forests along coasts and rivers to bring back fish and oyster stocks. And they have returned.
Trees are nature’s water filters, capable of cleaning up the most toxic wastes, including explosives, solvents and organic wastes, largely through a dense community of microbes around the tree’s roots that clean water in exchange for nutrients, a process known as phytoremediation. Tree leaves also filter air pollution. A 2008 study by researchers at Columbia University found that more trees in urban neighborhoods correlate with a lower incidence of asthma.
In Japan, researchers have long studied what they call “forest bathing.” A walk in the woods, they say, reduces the level of stress chemicals in the body and increases natural killer cells in the immune system, which fight tumors and viruses. Studies in inner cities show that anxiety, depression and even crime are lower in a landscaped environment.
Trees also release vast clouds of beneficial chemicals. On a large scale, some of these aerosols appear to help regulate the climate; others are anti-bacterial, anti-fungal and anti-viral. We need to learn much more about the role these chemicals play in nature. One of these substances, taxane, from the Pacific yew tree, has become a powerful treatment for breast and other cancers. Aspirin’s active ingredient comes from willows.
Trees are greatly underutilized as an eco-technology. “Working trees” could absorb some of the excess phosphorus and nitrogen that run off farm fields and help heal the dead zone in the Gulf of Mexico. In Africa, millions of acres of parched land have been reclaimed through strategic tree growth.
Trees are also the planet’s heat shield. They keep the concrete and asphalt of cities and suburbs 10 or more degrees cooler and protect our skin from the sun’s harsh UV rays. The Texas Department of Forestry has estimated that the die-off of shade trees will cost Texans hundreds of millions of dollars more for air-conditioning. Trees, of course, sequester carbon dioxide, a greenhouse gas that makes the planet warmer. A study by the Carnegie Institution for Science also found that water vapor from forests lowers ambient temperatures.
A big question is, which trees should we be planting? Ten years ago, I met a shade tree farmer named David Milarch, a co-founder of the Champion Tree Project who has been cloning some of the world’s oldest and largest trees to protect their genetics, from California redwoods to the oaks of Ireland. “These are the supertrees, and they have stood the test of time,” he says.
Science doesn’t know if these genes will be important on a warmer planet, but an old proverb seems apt. “When is the best time to plant a tree?” The answer: “Twenty years ago. The second-best time? Today.”
(I saw Jim Robbins’ essay in the New York Times, April 2012. It is reprinted here with his permission.)
This tree is a pioneer invader, which means that it is one of the first trees to repopulate cleared, eroded, or otherwise damaged land. It is unusually long lived among pioneer species, with the potential to live over 850 years.–Wikipedia
leaving, one limb at a time. Route 20 north between Charlottesville and Orange. Same tree in 2006
At this time we conclude that slight browning of newly-sprouted radicles should be ignored for planting acorns. Intentionally trimming the radicles may alter root morphology, while severe trimming will lead to sure failure of emergence.–University of California
This juvenile from an acorn found beneath the oak at 574 Locust Avenue. Germinated in December of 2010. The leaf looks like a white oak to me. The growth pattern looks anything but a white oak.