T. vulgaris. It is propagated in some of the Dutch nurseries where it 
is sold as T. vulgaris or europaea, and in the Arboretum collection it 
is the most rapid growing and the most shapely of all the species and 
hybrids, giving promise of becoming an excellent street tree for this 
region. 
Two Linden trees are found only in eastern Europe, the silver Lin- 
den, T. tomentosa or argentea, as it is sometimes called, and T. pe- 
tiolaris. The Silver Linden is a tree with erect branches forming a 
broad, compact, round-topped formal head, and large erect leaves dark 
green and lustrous above and white and covered below with short thick 
felt. This distinct and handsome tree has not been much planted in east- 
ern Massachusetts but it can be often seen in the neighborhood of 
New York and Philadelphia, and there are a number of good specimens 
in Central and Prospect Parks. T. petiolaris is a more beautiful tree; 
this also has leaves which are silvery white on the lower surface but 
they hang down on long slender stalks and flutter gracefully in the 
breeze. The branches, which are also pendulous, form a rather narrow 
but open head. This tree is not known in a wild state and all the plants in 
cultivation have been derived from a single individual found ninety years 
ago in a garden in Odessa. This beautiful tree appears to have been 
more often planted near Boston than the Silver Linden, but is still rare 
and little known here. A supposed hybrid of this tree with T. ameri- 
cana and sometimes sold in nurseries as T. alba spectabilis is one of 
the most rapid-growing of the Lindens and a very handsome tree with 
the leaves of the size and shape of its American parent but silvery 
white on their lower surface. Plants raised at the Arboretum from 
the seeds of a tree of T. petiolaris which was growing in the neigh- 
borhood of T. Americana , the two flowering at the same time, are 
identical with trees of this hybrid found in European nurseries. T. 
vestita is probably the proper name for it. 
Much attention in late years has been paid in Europe to another sup- 
posed hybrid Linden, T. euchlora , or as it is more generally known, 
T. dasystyla. This is a pyramidal tree, with large dark green leaves 
lustrous on their upper surface. It grows rapidly; its habit is good, 
and it is now largely planted as a street tree in Germany and Holland. 
Its origin is uncertain although usually considered a hybrid of the little 
known T. rubra of the Caucasus. T. euchlora is perfectly hardy here 
and promises to be a useful tree in New England. 
As a rule the trees of eastern Asia grow much better in the eastern 
United States than the related species of Europe, but this is not true 
of the Lindens. All the European Lindens flourish here but none of the 
Asiatic species give much promise yet of 'being handsome or valuable 
trees in this climate. Those which have been tried here are hardy but 
they suffer from various fungal diseases and are short-lived. It is too 
soon, of course, to form an opinion on the value of the Lindens recently 
discovered in western China, but of those of eastern Siberia, northern 
China and Japan only T. japonica has proved really satisfactory here. 
This is a small tree with pendulous branches, related to T. cordata , of 
which it has sometimes been considered a variety. It has no special or- 
namental value, although it is perfectly hardy and healthy and flowers 
and produces fruit in the Arboretum every year. 
The Arboretum will be grateful for any publicity 
given these Bulletins. 
