They're all silver linden - Tilia tomentosa - in an even-spaced row to replicate the historic landscape of Mass Ave. Restore Mass Ave suggested planting this row after the trees there were lost in storms.
We're grateful to the city Urban Forestry Administration (UFA/DDOT) for planting this row. In the photos below, taken last summer, UFA Arborist Vera (Munevver) Ertem marks where the new trees will be planted. The left photo shows the huge stump of the 100+year old tree that had been lost. At right Vera measures from one tree's center to the next, so they would be evenly spaced.
What's the pink dot on the curb? It is UFA-speak for plant tree here!
Why lindens on Mass Ave? The leaders of post-Civil War Washington revered the tree-lined formal thoroughfares of Paris and Berlin. So they landscaped Mass Ave with double rows of linden trees. In the 1870s and 1880 linden rows stretched on Mass Ave for five miles across town. When Mass Ave was extended another two miles to Wisconsin Ave, 500 more lindens were added in double rows, in 1904-05. Some of these elderly witnesses still stand - though they won't be with us much longer.
At right you see the bracts and
fruits of a silver linden on Mass Ave in early summer.
The linden blooms and scent were prized
additions to streets in
Europe and America.
The trees were closely planted for a great experience
walking and riding in carriages under them.