108 Holm — Additio'iiS to the Flora of Washington. 



*49r^ Nasturtium palustre DC. var. hispidum Fisch. & Mey. 

 Flats of tlie Potomac below C'hain Bridge. G. J\. Sudworth. 



* 50^/. Nasturtium sessiliflorum Nutt. 



Flats below Chain Bridge, May 29, 1890. G. B. Sudworth. 



55. Arabis dentata Torr. <.t Gray. 



Common on the Potomac shore jnst aliove Aqueduct Bridge, 

 Virginia. The author. 



70. Sisymbrium Alliaria Scop. 

 High Island. Miss Bebb. 



72. Camelina sativa Ciantz. 



Several specimens were observed along the Chesapeake and 

 Ohio Canal, east of High Island, in the third week of I\Iay. G. 

 B. Sudworth. 



74. Brassica nigra Koch. 



Upon the rocks on the Virginia shore at Chain Bridge. The 

 author. 



78. Thlaspi arvense L. 



Below the Insane Asylum. Lester F. \\^ard. 



CIST ACE jE. 



80 Helianthemum Canadense Michx. 



Mount Hamilton. E. S. Burgess. Oi)i)osite Oak Hill Ceme- 

 tery and at Bennings. G. W. Oliver. 



VIOL ACE JE. 



■89/;. Viola canina L., vav. Muhlenbergii Grav. 



Fourteenth street road and Rock Creek, June, 18S9. G. W 

 Oliver. 



* 89r. Viola odorata L. 



Near Accotink, Fairfax County, Virginia. William Hunter. 



POLYGALACE^. 



96. Polygala incarnata L. 



Terra Cotta swamp and along the Queens Chapel road. Les- 

 ter F. Ward and the author. 



