' Additions to tJn; Fiord of Wdslunglou. 119 



595. Asclepias variegata L. 



Terra Cotta. Roform School. E. S. Burgess. Fort Myer. 

 Tlie author. 



596. Asclepias quadrifolia Jtuq. 

 Chamffilirium Run^ E. S. Burgess. 



597. Asclepias verticillata L. 



Cascade Run. E. vS. Burgess. Rock Creek. Creat Falls. 

 Lester F. \Vard and the author. 



599. Enslenia albida Nutt. 



Al)undantly flowering under Chain Bridge, in the middle of 

 July. Lester F. Ward and the author. 



600. Gonolobus obliquus R. I>r. 



Bluti's of the Potomac, at two localities between M. E. Church 

 and Chain Bridge. H. W. Henshaw and E. S. Burgess. 



LOGANIACE^. 



* 601rf. Spigelia Marilaiidica L. 



In a moist thicket in the vicinity of Mount Vernon ; ilower- 

 ing in June, 1890. G. B. Sudworth. 



GENTIANACE^. 



* 602«.. Sabbatia gracilis Salisb. 



Low meadow east of Falls Church. C. Kinsley. 



604. Gentiana Andrewsii Griseb. 



Flats between Aqueduct and Chain bridges. Lester F. Ward 

 and the author. Terra Cotta Swamp. Lester F. Ward. 



607. Obolaria Virginica L. 



Rock Creek. G. W. Oliver. Several })laces in North Brook- 

 land. The author. 



POLEMONIA CE^E. 



608. Phlox paniculata L. 



Great Falls. Lester F. Ward and the author. 



