WILLOW FAMILY 
which he used frequently tosit. About the time of his death 
a storm shattered it and after the interment of the Emperor, 
Madame Bertrand planted several cuttings of the tree outside 
the railing which surrounded the grave. After various vicis- 
situdes one of the willows was found to be in a flourishing 
condition and from this one have been obtained the cuttings 
which have enabled so many to possess a plant of the true 
Napoleon’s Willow. 
Landscape gardeners plant the Weeping Willow by streams 
or waterfalls in conjunction with the Weeping Birch or in 
contrast with the Lombardy Poplar. To treat it artistically 
is oftentimes a problem, as it is difficult to make it harmo. 
nize with other trees. 
It roots freely by cuttings and grows with great rapidity 
ia a rich soil, near water. Its shoots are brittle and neither 
they nor the wood seem ever to have served any economic 
»yurpose. 
POPLAR 
Populus 
The word Populus is derived by some from fadlo, to vibrate or 
shake; others suppose that the tree obtained its name from being 
used in ancient times to decorate the public places in Rome, 
where it was called ardor poputi, or tree of the people. 
The Poplars are a group of rapid growing trees closely 
allied to the willows. Their range includes both temperate 
and arctic regions and in the extreme north they produce ex- 
tended forests. Nine species occur in the United States of 
which five are native to the eastern part of the continent, 
che others are Rocky Mountain or western trees. In addi- 
tion to these, three European species are naturalized here; 
the White Poplar, P. a/ba, the Lombardy Poplar, P. zigra var. 
valica, and the Black Poplar, P. zéera. 
The wood has become valuable of late for paper making. 
The bark is heavily charged with tannic acid and in Europe 
is used for tanning leather, 
410 
