EVERGREEN TREES AND SHRUBS. 
549 
purity of color which distin- 
guishes a young hemlock tree, 
it assumes with age a sombre 
tone. This expression, how- 
ever, is rarely acquired before 
it is thirty to forty years old, 
and may readily be counter- 
acted by planting the Chinese 
Fig. 174. 
wistaria. 
Virginia 
creeper, or 
trumpet creeper at its root. 
These will speedily intermin- 
gle the rich drapery of their 
lighter-colored foliage, and fall 
like pendants from the highest boughs of the tree. 
The following are varieties of our native hemlock : 
Large-leaved Hemlock. A. c. macrophylla.—TMis is distin- 
guished in the nursery by larger leaves and denser growth than the 
common hemlock, but whether it will exhibit peculiarities to render 
it worthy a distinct name is a question to be determined by longer 
cultivation. 
The Slender-dwarf Hemlock. A. c. microphylla, or A. c. 
gracilis . — A small-leaved, slender-branched, very dwarf variety that 
looks thin and uninteresting when young, but may possibly have 
some value at maturity. 
Parsons’ Dwarf Hem- 
lock. Abies c. Paf'sojii . — 
This is a very pretty dwarf, 
noticeable for the symmet- 
rical out-curve of itS slender 
branches. 
Sargent’s Hemlock. 
Abies c. Sargenti. — This bids 
fair to be one of the most 
curious and interesting ad- 
ditions to our stock of gar- 
denesque evergreens — bear- 
ing the same relation to the 
Fig. 175. 
