95 



Scout movement, another locality was disclosed. Through their 

 interest it was learned that the specimen came from near 

 Quakertown, Bucks County, Pennsylvania, having been com- 

 municated by Miss Mary H. Williams during the autumn of 

 1921. Two or three clumps had appeared spontaneously, some 

 time previously, along a driveway at Cellison's Mill and be- 

 cause of the attractive flowers had been allowed to remain there 

 rather than eradicated as an undesirable weed. This station is 

 some half-dozen miles in a general southerly direction from 

 Emaus and Pleasant Valley. 



After having seen the material of 5. tdigmosus augmenting 

 year by year, it was gratifying to discover a station myself in 

 a new area. During the recent war years "ballast-grounds" 

 were born anew about some of our seaports and it was possible 

 for a later generation to experience some of the thrills, and acquire 

 some of the enthusiasm, which the botanists of the 60 's and 70 's 

 of the last century had in exploring these bits of foreign territory 

 transplanted to our shores. It was indeed a novel and, not to be 

 denied, fascinating experience to pass in a few moments from 

 the streets of Philadelphia to what might readily have been 

 some European seaport. Among scores of foreign species, which 

 few botanists of the present generation have been so fortunate 

 as to see growing wild in America, on one of my visits to the 

 ballast-grounds at the foot of Wolf Street, along the Delaware 

 River, June 27, 192 1, was a Sonchus in its first bloom. There 

 was a single, closely compacted colony about a foot and a half 

 high. The knowledge that 5. arvensis was one of the regular 

 denizens of the ballast-grounds of the old days almost allowed 

 me to greet the plant as an old friend among the host of strangers. 

 But its glabrous pedicels and involucral bracts, on second 

 examination, corrected this impression. With this occurrence in 

 Philadelphia an extension was made of about forty miles south 

 of Quakertown. 



In recent years our knowledge of the plants of Delaware has 

 been annually increased by Rev. J. P. Otis, and during 192 1 one 

 of his interesting discoveries was a colony of 5. iiUginosus. 

 September 19, 192 1, as he was crossing certain open ground 

 along the Lincoln Highway near Marshallton, he was attracted 

 by the large yellow heads of the unfamiliar species. There 

 were some half-dozen plants growing near together (but not 



