93 



He has kept detailed field-notes on the various occurrences, 

 and through his kindness I have been privileged to draw freely 

 from them. 



The first collection of the plant was made along the Philadelphia 

 and Reading Railway adjacent to Allentown, September 22, 

 191 7. In the hope of getting better material the spot was 

 visited the following year, but the station had been destro^-ed 

 in the laying of additional tracks. Although this station had 

 been lost another was discovered July 28, 191 8 in Lehigh County 

 near Emaus. There was a small colony of possibly one or two 

 dozen plants growing close to a hedgerow, paralleling the public 

 road and trolley-line. It occurred in rough ground largely of 

 cinder and slag talus from the adjacent dump of the Donaldson 

 Iron Company. The plants were already showing some clusters 

 of mature heads, with the pappus blowing away, while others 

 were in handsome full-bloom. 



Several times, while passing rapidly, a guest on automobile 

 rides, Mr. Pretz had made note of a conspicuous yellow-flowered 

 plant along Walbert's Pike not far out of Allentown, but not 

 until August I, 1919, did opportunity occur to collect this 

 plant and prove it to represent another station for the new 

 Sondms. It had become abundantly established on a grassy 

 strip between the road and a cultivated field. A similar- 

 appearing plant had also been noticed from an automobile near 

 Dorneyville crossroads (Lehigh County) and a trip was made 

 August 9, 1919 by Mr. Pretz foi the collection of the plant. It 

 was here found established at several places along the fence- 

 rows on both sides of the road, and was also verj' abundant 

 in an abandoned field nearby. The plants in the old field were 

 especially vigorous and well developed, specimens over five 

 feet high being collected. This same year, still another new 

 station was detected: about two and a half miles west of 

 Centre Square, Allentown. August 14, 1919 material was 

 collected here from a fair abundance of the plant along a fence- 

 row between road and field. A half-mile or more north of this 

 station occurs what appears to be, observed from the passing 

 trolley-car, another colony of the species. 



In 1920, Mr. Pretz made two new collections and more 

 observations in Lehigh County. August 15 a colony of the 

 plant was found some two miles from Wescoesville P. O., es- 



