The American Botanist 



VOL. XVIII JOLIET. ILL., AUGUST, 1912 No. 3 



LIBRAE 



rv/ien zenit/i high the sun of ^^vgust burns, 

 ■^lour fresh and cool the fronctaae of the ferns/ ,. .^,. 



-^iLsle upon ivaving aisle hehold them stand 



<-/» forest shade for folks of fairy land. 



— Clinton Scollard. 



PHLOX ARGILLACEA. 



By Willard N. Clute. 



ABOUT a year ago Mr. James H. Ferriss and the writer 

 described a new species of phlox from northern IlHnois 

 under the name of Phlox argillacea. When this species is 

 not in bloom it has a superficial resemblance to Phlox pilosa 

 and this probably accounts for the fact that it so long escaped 



the notice of botanists in a region where plant students are 

 abundant. 



A glance at the accompanying illustration, however, is 

 sufficient to convince the ordinary observer that this is not 

 Phlox pilosa. It is much taller, lighter green, and more flori- 

 ferous than that species and its season of bloom is both longer 

 and later. Having had the plant under cultivation for some 

 years, we feel warranted in saying that it is well worth the at- 

 tention of the flower lover and cultivator since it almost ex- 

 actly bridges the season between the early blooming phloxes 

 like P. divaricata and P. sitbulata and the well known plants 

 of various species known to the gardener as late perennial 

 phloxes. The color, too, is such as to recommend it. While 

 the petals are white, the tube of the corolla has tints of purple 

 and lavender in it and the nectar guides, two of which appear 



