53 



Ostrya oarpinifolia, Scopoli. 



South Europe and Orient. The Hop Hornbean. A deciduous tree, 

 60 feet high. 



Ostrya Virginica, Willdcnow. 



Leverwood tree of North America, 40 feet high, in rich woodlands. 

 Wood singularly hard, close-grained and heavy, in use for levers and 

 other implements. 



Pistacia vera, L. 



Indigenous in the Orient, as far as Persia. A deciduous tree, 30 feet 

 high, yielding the Pistacia Nuts of commerce, remarkable for their 

 green almond-like kernels. The likewise deciduous Mediterranean 

 Pistacia Terebivthus, L. , yielding the Ohio Turpentine, the P. Atlantica, 

 Desf., and the evergreen South European Pistacia Lentiscus, L., 

 furnishing the mastix, grow rarely to the size of large trees. 



Planer a Japonica, Miquel. 



Considered one of the best timber trees of Japan. 



Platanus occidentalis, L. 



The true Plane tree of the East part of North America. More eligible as 

 an avenue tree, than as a timber tree ; diameter of stem at times 14 

 feet ; wood dull red. 



Platanus orientalis, L. 



The Plane tree of South Europe and Middle Asia. One of the grandest 

 trees for lining roads and for street planting, deciduous like the other 

 planes, rather quick of growth, and not requiring much water; attains 

 a height of 90 feet. The wood is well adapted for furniture and other 

 kinds of cabinet work. 



Platanus racemosa, Nuttall. 



The Californian Plane tree. Wood harder and thus more durable 

 then that of P. occidentalis, also less liable to warp. 



Populus alba, L. 



The Abele or White Poplar of Europe and Middle Asia. Height 90 feet. 

 It proved here an excellent avenue tree, even in comparatively water- 

 less situations, and gives by the partial whiteness of its foliage a 

 pleasing effect in any . plantation. Populus canescens, Sm., the grey 

 Poplar, is either a variety of the Abele or its hybrid with the A6pen, 

 and .yields a better timber for carpenters and millwrights. 



Populus balsamifera, L. 



The Tacamahac or Balsam Poplar, of the colder, but not the coldest 



parts of North America, 80 feet high. Its variety is P. candicans, 



Aiton. 

 Populus grandidentata, Michaux. 



North America, 60 feet high. A kind of Aspen. 

 Populus heterophylla, L. 



The downy Poplar of North America. Height 60 feet. 



Populus monilifera, Aiton. (P. Canadensis, Desf.) 



The Cottonwood tree of North America. Height 100 feet. One of the 

 , best poplars for the production of timber. 



Populus nigra, L. 



The European Black Poplar, extending spontaneously to China. It 

 includes Populus dilatata, Aiton, or as a contracted variety, P. fasti' 



