HORTICULTURAL DIVISION 673 



There should be trained men to head each of the following lines: 



General maintenance: Propagation: 



Lawns. Temporary material: 



Shrubbery plantings. Annuals. 



Trees, including street plantings. Bedding plants. 



Gardens. Greenhouse shows. 



Show greenhouses. Permanent material: 



Installation: Herbaceous perennials. 



Lawns. Deciduous trees and shrubs. 



Woody plants. Cone-bearing evergreens. 



Gardens. Broad-leaf evergreens. 



Bedding. 



Greenhouse exhibits. 



In a small park system two or three men will head all of these lines. 

 Much of the installation or new plantings may be done at seasons of the 

 year when maintenance or propagation work is not pressing. Competent, 

 although apparently high-priced help, should be given to all these leaders. 

 Extravagance often occurs in park systems by employing men untrained in 

 the particular lines of work to which they are assigned. It is frequently 

 assumed that because a man has been successful in more or less closely 

 allied work, he is able to take up any of these lines. Such an experience is 

 valuable, providing the rudiments upon which the necessary structure maybe 

 built, and often contributes towards the training necessary for efficient work. 



SECTION II 



NOTES ON DIFFERENT GROWING REGIONS OF THE UNITED STATES, 

 TOGETHER WITH LISTS OF HERBACEOUS PERENNIALS AND 

 ORNAMENTAL SHRUBS AND TREES BEST ADAPTED 

 TO EACH REGION 1 



The United States presents a great variety of growing conditions. 

 Some of the perennials and ornamental trees and shrubs are adapted to 

 many of these conditions, others to but a few. In order to make these 

 variations as intelligible as possible a map (Plate 254) has been prepared 

 in which the areas with approximately similar growing conditions are speci- 

 fied by numbers with heavy border lines. In the following pages the general 

 characteristics of these regions are discussed. This is followed by a table 

 showing in which of these regions certain specified perennials may be 

 expected to thrive, and by a table showing in which of these regions speci- 

 fied ornamental shrubs and trees may be expected to thrive. The section 

 closes with some notes on lawn grasses. 



1 The material in Section IV was prepared by the Bureau of Plant Industry of the United States Depart- 

 ment of Agriculture. That part of the section dealing with herbaceous perennials originally appeared in Farmers' 

 Bulletin No. 1381, "Herbaceous Perennials," by Furman Lloyd Mulford, issued May 1924. That part dealing 

 with ornamental shrubs and trees and grasses is a part of an Extension Handbook issued September 1927. 



