484 Harper : Collection of Plants in Georgia 



so that unless a specimen of Rafinesque's plant is found, it must 

 continue to be classed among his numerous unidentified species. 



The nomenclature of this genus is in a somewhat unsettled 

 condition (see Barnhart in Bull. Torr. Club, 24 : 411), but I have 

 used the generic name which will be best understood until a suit- 

 able substitute is found. I would hardly regard Baldwinia as con- 



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generic with Actinospermum, as has been done by some authors. 



gustifolium 



Collected on dry sand-hills near Seventeen Mile Creek, Coffee 

 county, September 24 (no. 697), and observed in similar situa- 

 tions near the Satilla River in Ware county, September 28. 

 Accompanied by Dicerandra odoratissima at both stations. 



Helenium tenuifolium Nutt. 



The spread of this weed in northwest Georgia during the past 

 few years has been remarkable. While in Dalton I was asked by 

 many people if I had noticed how it had taken the place of the 

 dog-fennel {Anthemis Cotula), which was as abundant when I lived 

 there, ten or twelve years ago, as Helenium is now. Some thought 

 that the Anthemis had all changed into Helenium by some sort of 

 metamorphosis. Anthemis has now almost disappeared from the 

 vicinity of Dalton, while Helenium is everywhere in vacant lots and 

 along roadsides. The latter is represented in our collection by 

 Mr. Wilson's no. 88, from Dalton, July 20th. I do not recall 

 another case of an American weed driving out a European one. 



Helenium is also common in middle and south Georgia, but 

 does not seem to have perceptibly increased in those sections since 

 1895, when I first became acquainted with it. 



Lactuca Scariola L. 

 This weed seems to be obtaining a foothold in Georgia. I 



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collected it in Athens July 2 (no. 122), and afterward saw it in 

 Floyd and Whitfield counties. So far I have seen it only along 

 railroad tracks. 



Besides the species here mentioned, there are several others m 

 my collection of 1900 which appear to be undescribed, but as they 

 seem to present more difficulties than those herein described, they 

 are reserved for further study. 



Columbia University. 



