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Several notable hybrid roses have appeared in the Arboretum 
raised by Mr. Jackson Dawson. Mr. Dawson has, like Professor 
Sargent, seen, and helped in, the development of the Arboretum 
since its inception, and in regard to the outdoor department he has 
in a great measure played the part of builder to that of the 
Professor’s architect. Trees now 60 feet high, he himself raised 
from seed, or collected as seedlings in the forests. Gifted with that 
peculiar understanding of plant life which enables its possessor to 
ivine by intuition the treatment best suited to his charges and the 
happiest devices for increasing their number, Mr. Dawson has done 
much by his genius as a propagator towards making the collections 
so rich as they now are. e was about the first to recognise the 
value of Rosa multiflora and R. Wichuraiana for hybridising, and 
such fine roses as The Dawson, Lady Duncan, E. C. Egan and 
Arnoldii are the products of his skill. 
I was fortunate to see a new rose in flower which Mr. Dawson 
has raised and called “ Professor C. 8. Sargent.” The original 
plant raised in 1903 is now 8 feet high and 9 feet through, a sturdy 
bush with splendidly vigorous foliage. It bears large flattish trusses 
of semi-double flowers 3 inches across, of a delicate, apple-blossom 
shade, and from 30 to 50 ina truss. In June it was carrying 
thousands of flowers—a wonderfully beautiful picture. Its parentage 
is as follows: pollen bearer “ Baroness Rothschild” ; seed-bearer 
an unnamed hybrid between R. WichuraianaP and “ Crimson 
Rambler”. In this interesting combination the influence of 
R. Wichuraiana is only seen in the very glossy, thick, dark green 
foliage. : 
Wuat THE ARBORETUM HAS DONE. 
0 
one respect part of the park system of Boston, it provides a very 
beautiful place of resort for the people of that city. It provides 
also many lessons in landscape art, for there is evidence that every 
aspect of the grounds has been the subject of careful study in that 
respect. While the scientific side of the establishment necessarily 
dominates all others, the natural beauties of the site have not only 
been preserved but greatly enhanced. 
Considered from the practical side, as apart from pure botany, 
perhaps the most notable work it has done has been the popularisa- 
tion and dissemination of American trees and shrubs. Before its 
foundation, American gardens appear to have mainly depended for 
their ornamentation on plants of European origin. As an instance, 
I was told that 30 to 40 years ago one could not have purchased 
one hundred American oaks in American nurseries. 
the East United States has given an extraordinary number of 
beautiful trees and shrubs to English gardens, and in the latter half 
of the 18th century and the beginning of the 19th their introduction 
and cultivation was the chief interest of the most ardent horticul- 
turists of the period. Many of the shrubs then introduced dis- 
appeared in course of time, and the Arnold Arboretum has done 
