212 Landscape Gardening 



when the branches are frozen, for nothing is more destruc- 

 tive to its beauty than contact in zero weather. Among 

 the most valuable varieties are the following: 



Siberian Arbor- vitae (T. o., var. Wareana, or Siberica), 

 Fig. 117. — Compact, dwarf, conical in form, of a much 

 darker green than most of the varieties, and it takes on 

 less of the brown color during the winter than any other 

 form of the species; especially valuable for hedges. 



Pyramidal Arbor -vitae (T. 0., var. pyramidalis). — Of 

 close, compact, pyramidal form, it serves a good purpose 

 where small columnar trees are desired. It is of about the 

 same color as the original type of the species. 



Globe Arbor-vitae {T. 0., var. globosa) .—CompsLct 

 and globular in form, of a dark-green color, and valuable 

 for low hedges or for small, very low, round-headed 

 trees. 



Golden Arbor-vitae {T. 0., var. aurea). — Several varieties 

 with golden-tipped branches or with the whole foliage 

 of a very light green color are offered by nurserymen, 

 and planted in contrast with dark green varieties they 

 produce a very pleasing effect. Perhaps one objection may 

 be urged against them, as with other trees with yellow 

 foliage, that they have the appearance of sickly trees, but 

 when properly grouped they may be made to tone down 

 sharp contrasts and to add tints to groups not otherwise 

 obtainable. The small varieties of evergreens, junipers, 

 arbor-vitaes, retinosporas, yews, etc., and the dwarf forms 

 of the larger growing kinds are being largely used, banked 

 against the front of verandas, the base of buildings, pergolas, 

 summer houses, etc. A variety of these neatly grouped in 

 this way adds much to the beauty of the grounds between 

 the lawn and the house if the latter is not too close to the 

 road. However, in such case great care must be taken that 

 the soil does not become very dry during the summer, especi- 



