The native habitat or origin is given after each name. The 
parentage of hybrids, where known, is listed in paren¬ 
theses. 
LESS HARDY PLANTS 
Trees and shrubs that are known to require a sheltered 
situation or protection through the winter are indicated 
by the use of small capital letters. 
GENERAL INFORMATION 
The listing of trees and shrubs contained in this hand¬ 
book has been prepared by Mr. Ralph Pinkus, Arboretum 
Foreman at the Garden. Both Mr. Pinkus and Mr. J. H. 
Beale, Superintendent of the Arboretum of the Boyce 
Thompson Institute for Plant Research, Yonkers, N. Y., 
assisted in preparing the comments that appear after each 
generic name. It should be noted that these comments ap¬ 
ply only to the plants listed and not necessarily to other 
species and varieties. Flowering dates given are based in 
the main on records kept by Mr. Pinkus at the New York 
Botanical Garden. In cases where plants have not yet 
reached blooming size at the Garden, the flowering dates 
recorded in Rehder’s “Manual of Cultivated Trees and 
Shrubs” are given. 
T. H. Everett, 
Horticulturist. 
vii 
Nov. 1, 1942. 
