EUCALYPTUS TREES. 5381 
Mexico. Thrives best on dry limestone soil. Great- 
est height 80 feet. P. rigida is content with the dri- 
est localities, nor is it readily susceptible to injury 
from fire. 
Pinus flexilis, James. — The White Pine of the 
Rocky Mountains, from New Mexico to British Co- 
lumbia, ascending to 12,000 feet. A valuable fir for 
cold regions. It attains a height of 100 feet. Wood 
pale and compact. P. radiata can be utilized for ob- 
taining tar and pitch. It bears exposure to the sea at 
the very edge of the coast. 
Pinus Haleppensis, Mill. — Although ascending 
mountains in South Europe to the height of 4,000 
feet, it thrives best in loose sand -coasts, where, in ten 
years, it will attain to 25 feet, and finally will become 
a larger tree than on firm lands, We find the Halep- 
po-fir one of our best avenue-trees, as here first proved 
by the writer. 
Pinus Strobus, Linné. — Particularly adapted for 
deep, rich soil in mountain valleys; known to reach 
a height of 270 feet and a stem of 8 feet diameter. 
The wood is much sought, among other purposes, for 
flooring, oars, ete. 
Platanus occidentalis, Linné.—Its wood is not read- 
ily attacked by insects. It has been successfully plant- 
ed in morassy places, to cope with miasmatic effluvia. 
Platanus orientalis, Linné. — It resists, in large 
towns, such as London, the smoke better than any 
other tree, growing even under such disadvantages 
vigorously. 
Platanus recemosa, Nutt. —A good promenade-tree, 
which, according to Professor Bolander, grows more 
rapidly and more compactly than P. occidentalis. 
