202 



HOETICULTURE 



August 12, 1916 



men his knowledge of the art of plant cultivation and 

 propagation, and to inspire them with some of his 

 great love for these things. 



Those who personally were fortunate enough to know 

 this grand man their sorrow will be very deep and, as 

 for myself, having known and associated with him for 

 over thirty-four years, at his demise I fail to find words 

 to express my sorrow. 



Bo. Orange, 

 N.J. 



Pyrethrum uliginosum 



It is with the greatest sorrow that I hear of the pass- 

 ing away of Jackson Dawson on the 3d of August. His 

 death will be a great loss to the Arnold Arboretum and 

 to Horticulture in general and I doubt if his unique 

 position can ever be filled by anyone else, I shall per- 

 sonally miss him greatly a,s it was always a great pleas- 

 Tire for me to talk to "him. His knowledge of plants 

 and their requirements was ver}' great and his expert 

 ness in the propagation of trees, shrubs, etc., was most 

 extraordinary. Tlie most difficult plants to multii)ly 

 had no secrets from him. It is most unfortunate that 

 he leaves no written record of his work. Wl:en it is 

 realized that the great majority of the trees and shrubs 

 in the Arnold Arboretum have been propagated by him 

 the extent of his work tan be understood. He has at 

 any rate left a magnificent monument to his memory in 

 the great number of fine trees in the Arnold Arboretum 

 today that he has cared for from the day the seed 

 germinated. It can be truly said that "His memory 

 will bo kept green." 



^^^<^ 



New York. 



1 wa.* verv soriy infloed to learn that our good 

 friend, .Tack.sim Dawson, had passed away. His place 

 in horticulture will be very difficult to fill. 1 miglit say 

 almost impossible, at lea.st in tliis gem-ration. His like 

 is not bora every day, and, in his passing, a figure has 

 vanished which occupied a large space in the horticul- 

 ture of the United States— I might say in the world. 

 His lovable, kindly spirit will be missed very much by 

 those who had the i)leasuie and ])rivilege of knowing 

 him and meeting him now and then. 



New Yorh. 



^7^^^ 



^^L-^A^ 



Dear Mr. Stewart: — 



Since Wilson wTote that appreciation on Jackson 

 Dawson last January. I have been several times 

 minded to write and thank you for scattering 

 roses along the evening walk of one we all loved so 

 dearly, and lo! I have just received a message that he 

 passed away. I count the friendship of Jackson Daw- 

 son among the richest treasures I have owned. Always 

 so true, affectionate, loyal and magnanimous he was in- 

 deed a friend in the true sense. For over twenty years 

 I grew up close to his family and feel I know him in- 

 timately and it is a knowledge that increases his 

 measjure. For your timeliness and goodness in publish- 

 ing that tribute I wish to cordially thank you in 

 hrightening the way of our mutual friend. 



Portland, 

 Oregon. 



The Giant Daisy, Pyrethrum uliginosmu, is a native 

 of eastern Europe. In standard works and catalogues 

 we find it differently described and listed. Sometimes 

 it is classed among the chrj-santhemums ; again there 

 are authors who insist on the name Leucanthemum 

 uliginosum as being the correct one. Practical horti- 

 culturists well acquainted with hardy herbaceous plants 

 agree on its merit as a very effective midsummer flower- 

 ing perennial for the border. Reaching a height of 

 about 4 feet, an abundance of large white flowers on 

 erect slender stalks stand out boldly and when group- 

 ed in clumps of the size indicated by our illustration 

 can be easily made a conspicuous feature of floral gar- 

 den arrangements. As fitting associates I mention 

 Japanese anemones and hardy asters of the novae- 

 augliffi type, j)rofeiTing pink and lavender shades. In 

 cases where a more dashing color effect is desired I 

 would not hesitate using tritomas of the Pfitzerii, sul- 

 ))hurea or uvaria grandiflora varieties in combination. 



1 am told that the giant daisy frequently does not 

 >ome up to expectations. The reason for this is that 

 we do not know the full cultural requirements. A 

 moderately moist location is the ideal one. Pyrethrum 

 uliginosum must liave a free sunny exposure, rich soil 

 and ])lenty of water. Plantations stunted in growth 

 during early droughts will not produce good flowers. 



I wish to call attention to the comparatively new 

 variety Pyrethrum uliginosum stellatum, originating 

 in the nurseries of Ilenrj' A. Dreer. The flowers of stel- 

 latum are of decidedly larger size than those of its 

 parent. It is also distinguishable by its long narrow 

 petals adding grace and a certain refinement to tlie form 

 of the flowei's. 



To prevent exhaustion of the soil a nnilcliing of old 

 barnyard manure over winter as protection is especially 

 recommendable for giant dai.sy plantations. Plants may 

 be raised from seed sown in cold frames during April 

 and May. Propagation by root division, however, is the 

 quickest way to increase stock. 



(ilenside, Pa. -^JUtAxXAxJL -SiUOtAy^ 



