Sunday, October 16, 2011

Pruning Watch: Historic Crimean Linden

15 SEPT 2011

THE BLAST OF BUZZ SAWS in Sheridan Circle made me hurry there, expecting the worst.

The noise came from someone in a cherry picker, high in the branches of possibly the most remarkable historic tree on Embassy Row.  In the surrounding lawn of Sheridan Circle lay piles of fat logs; clearly the job under way was part of the Park Service’s maintenance of the area. 

“No cutting down, only pruning,” the work crew told me. But it takes just an hour for a well-equipped crew to massacre a century ‘s worth of slow tree growth.  I asked the crew to stop while I contacted the company, GreenTree.  The dispatcher put me in touch with the Park Service supervisor; he was nearby and came over. He too said the job was “only” pruning and that the tree’s lovely form would stay intact.

Below, limb removal from the Crimean linden

So: how well did GreenTree prune the tree?

The “before” photo below was taken in September 2007, looking south across Sheridan Circle.   The “after” photo was taken a few days ago, when GreenTree finished.  And, note, pruning mature trees is art as well as science.* ,

Below, taken in September 2007 (Photos: Restore Mass Ave)

What makes this tree historic and newsworthy? It was likely a mistake!

This tree’s low, curving branches suggest it is a Crimean linden (Tilia euchlora) that branch near the bottom; they are different from straight-trunked lindens such as American linden (Tilia Americana).   

Below, taken in September 2011

After the Civil War, the city’ horticulturalists who turned  muddy Washington into the “City of Trees,” used one species on a street or monoculture.

They chose the American linden for Mass Ave, to make it better than Berlin’s famous grand avenue, Unter den Linden. News accounts and city engineers’ reports show that this one species was planted in double rows for four miles across the city.

The Washington Post on Sept 4, 1904 wrote that a ”highway” of 500 more lindens would be planted on the new part of Massachusetts Avenue, to make it “Earth’s noblest shaded way.”  A typical later account two decades later was a news story of the writer’s trip, from Union Station to beyond Sheridan Circle, under the fragrant canopy of linden blossoms in June. The linden rows of Berlin were “a disappointment” compared to Mass Ave.

The rows were always reported to be of American lindens.

If this Crimean linden was an error, it was a spectacular one!


Useful links:

* Trees Are Good (International Society of Arboriculture , ISA)
Pruning mature trees (PDF with useful illustrations)

1904 Linden Beats Hurricane Damage

7 SEPT 2011

EMBASSY ROW’S TREES were among the lucky ones spared when Hurricane Isabel swept across Washington August 27.  One very large street tree behind the Embassy of Cameroon (2349 Mass) toppled; but its upended roots show it was a goner already and the city will replace it.  

A huge American linden on the northwest corner of Sheridan Circle lost a massive branch.  We know and admire this tree, which was installed in the city’s planting of 500 Tilia Americana along Mass Ave in 1904.

Below: This 2008 photo shows a new linden we added to fill in the line by  the house at 2324 Mass Ave. Behind it is the large linden that dates from the planting of the ‘second row’ in 1904. (Photos: Restore Mass Ave)

This tree has thrived for more than a century. Anyone looking up into its high, graceful branches can see how well “second row” trees grow in open lawns. They root well in the land along the edge of Mass Ave known as “the parking” – public land which city horticulturalists planted as “park” with rows of shade trees more than a century ago.

The Embassy of Korea maintains the section of “the parking” as velvety lawn shaded by the massive linden.   To rebuild the “second row” of trees here, Restore Mass Ave arranged the planting of another large-type linden (Tilia tomentosa) in 2007.  Also thanks to our non-profit partner Casey Trees, in 2009 we planted two new ginkgo biloba trees, filing in the “second row” ring around the circle.

Below: The same 1904 linden with the branch belled by the hurricane The Embassy of Korea allowed this fine example of historic landscape to survive.

Thanks the Embassy and Dodson Tree Co., only the fallen part of this big old linden was removed.  And at least one expert who toured the trees after the storm told RMA that  the tree’s remaining structure is  sound enough for it to survive.