74 ^Steele — Additions to the Flora of Washington. 



577. Lysimachia Nummularia I>. 



A lai'ne patch on a roadside at Jiladeiisbiirii-: also on Potomac flats near 

 the dumpinfi" ground. 

 572. Steironema lanceolatum (WaU.) A. (iray. 



To Professor Ward's localities may be utlded Kenilworth swamp, and 

 low ground north of leaver Dam Branch. 



574. Steironema quadriflorum (Sims.) A. S. Hitchc. {S. lungiflorum 

 of Ward's ( iitalo^'ue). 

 Seen by me only on the river bank al)<>ve Chain itridii'e on the Virginia 

 side, coming into bloom July 4, ISiXi. 



579a. Centunculus minimus Ti. 



A few siiecimcns near P)lailensburg. 



6016. Polypremum procumbens L. 



One plant at Kenilworth, August 11, 1898. 

 603. Qentiana Saponaria L. 



1 have both stout and very slender specimens (the latter from Takoma 

 Park) which it seems nec(?ssary to refer to this species. 

 606. Bartonia Virginica (L.) B. S. P. 



Kenilworth swam]) and one of the Paint IJranch swamps. 



589. Asclepias rubra L.. 



Sparingly in Kenilworth swamp and north of Beaver Dam Branch; 

 also in the Paint Branch region, but more abundant in a swamp on the 

 Columbia pike, south Arlington. 



590. Asclepias purpurascens L. 



(ilen Echo railroad at foot of the long hill, .lune 2\, 18!)8. 



596. Asclepias quadrifolia .lac(|. 



Woods near Che\y Cliase railroad and on l*lunimer"s Island: very 

 scarce. 



599. Ampelanus albidus (Null.) Brilton. 



Not rare along the canal, and once observed near TcMileylown .lunction. 

 Also in N'arious places at .lackscjii City, where IVuils were collected Sep- 

 tember 21, 1S!)S. 



601. Vincetoxicum hirsutum (Michx.) Britton. {(ionolobus, oWXaviV^ 

 Catalogue. 

 On a bluff off from the Giesboro road. May 20 and July 22, 18!)!l. The 

 shape of the c\ip in the corolla agrees better, howe\er, with that assigned 

 to V. Cco'olinensi . 



600. Vincetoxicum obliquum (Jac(|.) ihitton. 

 Abinidant on I he slope above the canal road. 



*630a. Quamoclit Quamoclit (Ij.) Britton. 



Steadily self-pi-opagating in m.\- yartl; also dumping ground, Potomac 

 flats. 

 630. Quamoclit coccinea (L.) Moench. 



Suitland, cultivated ground, September 8, 18!l!>; later, several places 

 on the dumi)ing grounds. 



