EVERGREEN TREES AND SHRUBS. 519 
The Pigmy White Pine. P. strobus nana . — An exceedingly 
diminutive curiosity, having a broad, flattened form, and maturing 
at the height of one to two feet. 
The Dwarf White Pine, P. s. pumila . — A globular, bushy 
diminutive sort, with all the characteristics of the white pine, except 
that the annual growth is so short that it becomes an evergreen 
shrub only, from six to ten feet in height and breadth. 
The Compact White Pine, P. s. compacta^ is so similar to 
the above, that the difference is not material when they are young ; 
but this one is said to exceed it in size at maturity. It is, un- 
doubtedly, the finest dwarf form of the species, and, we think, of 
the whole pine family. The foliage is not diminished in size, but 
only the woody growth. Height and breadth, probably., from ten 
to fifteen feet at maturity. The annual growth is from two to five 
inches. The common white pine, if cut back annually from the 
beginning, would present nearly the same appearance. 
The Snow or Silver Pine. P. 7iivea . — A lofty tree, quite 
similar to the white pine, and supposed to be a variety of it \ but 
the leaves are somewhat shorter, and more gray or “silvery” 
below. Of little value, as distinguished from the white pine. 
The Rigid Pitch or Pond Pine. P. rigida ( P. 'serotma ).— 
Leaves in three’s, three to four inches long. Cones ovate-oblong, 
in three’s or four’s, much shorter than the leaves, their scales ter- 
minated by a rough, thorny point. 
An irregularly-branched, rough-barked tree, with coarse, warm, 
green foliage, not very dense, and rather tufted, and borne prin- 
cipally on the outside of the tree. The branches are not numerous, 
and radiate so as to form, when growing in open ground, a broad 
oblate or flattened head, the lower branches bending down at their 
extremities. Seen at a distance, a well-grown tree is pleasing by 
virtue of the warmth of its green color, and its umbelliferous head ; 
but a ragged-limbed, rude tree, when seen near by. The bark is a 
warm brown color, broken irregularly into large patches, like the 
markings of a turtle’s back. Found principally away from the 
sea-coast, from Canada to Virginia, generally in poor, sandy soils. 
Height forty to seventy feet. 
