(6i) 



the immediate vicinity are located the retinisporas, which 

 are so commonly cultivated as decorative plants. There 

 are many horticultural forms here represented, but they 

 are all variations of two Japanese trees: the Sawara cypress 

 {Chamaecy parts pisifera) ; and the Hinoki cypress (Cham- 

 aecyparis obtusa). The latter species is frequently used by 

 the Japanese in their dwarfing process. The names borne 

 by the various horticultural forms have been suggested by 

 some peculiarity in coloring or in manner of growth. 

 North American species of the genus Chamaecyparis will 

 be found in the low ground along the south walk, not far 

 from the south gate. 



On the easterly corner of the conservatory terrace, oppo- 

 site the retinisporas, is a part of the juniper, or red cedar 

 (Juniperus), collection. The remaining and larger portion 

 of this collection will be found on the easterly end of the 

 area lying between the driveway and the traffic-road south 

 of the conservatories. In these two areas will be found 

 many species and varieties of these plants. The common 

 juniper, of north temperate regions, is one of these; also 

 the Irish juniper, a form of this, of compact and strict habit. 

 The red cedar, so common in a wild state in the grounds of 

 the Garden, finds representatives in many horticultural 

 forms. The savin juniper, of Europe and northern Asia, 

 and its American representative, the prostrate or Waukegan 

 juniper, of northern North America, are both neat low- 

 growing sorts. The Chinese juniper, and its striking form, 

 of columnar habit, known as variety pyramidalis, are each 

 present in a number of specimens. There are still other 

 varities of the Chinese juniper represented here, including 

 Pfitzeriana, one of the best dwarf conifers. 



At the westerly end of this area is the arbor vitae group 

 {Thuja). The species of this genus produce a durable wood 

 which is of especial value where there is contact with the 

 soil. The Japanese arbor-vitae is represented by several 

 specimens. The common arbor-vitae, or white cedar, 

 from northeastern North America, is fully represented, not 



