74 Steeie Additions to the Flora of Washington. 



577. Lysimachia Nummularia L. 



A large patch on a roadside at Bladensburg; also on Potomac flats near 

 the dumping ground. 

 572. Steironema lanceolatum (Walt.) A. Gray. 



To Professor Ward's localities may be added Kenil worth swamp, and 

 low ground north of Beaver Dam Branch. 



574. Steironema quadriflorum (Sims.) A. S. Hitchc. (8. longiflorum 

 of Ward's Catalogue). 



Seen -by me only on the river bank above Chain Bridge on the Virginia 

 side, coming into bloom July 4, 189(5. 

 579. Centunculus minimus L. 



A few specimens near Bladensburg. 

 6oib. Polypremum procumbens L. 



One plant at Kenilworth, August 11, 1898. 

 603. Qentiana Saponaria L. 



I have both stout and very slender specimens (the latter from Takcma 

 Park) which it seems necessary to refer to this species. 

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



Kenilworth swamp and one of the Paint Branch 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. 



Glen Echo railroad at foot of the long hill, June 24, 1898. 

 596. Asclepias quadrifolia Jacq. 



Woods near Chevy Chase railroad and on Plummer's Island: very 

 scarce. 



599. Ampelanus albidus (Xutt.) Britton. 



Not rare along the canal, and once observed near Tenleytown Junction. 

 Also in various places at Jackson City, where fruits were collected Sep 

 tember 21, 1898. 



601. Vincetoxicum hfrsutum (Michx.) Britton. (Gonolobus, of Ward's 

 Catalogue. 



On a bluff off from the Giesboro road, May 20 and July 22, 1899. The 

 shape of the cup in the corolla agrees better, however, with that assigned 

 to V. Cttrolmenxe. 



600. Vincetoxicum obliquum (Jacq.) Britton. 

 Abundant on the slope above the canal road. 



-6300. Quamoclit Quamoclit (L.) Britton. 



Steadily self-propagating in my yard; also dumping ground, Potomac 

 flats. 

 630. Quamoclit coccinea (L.) Moench. 



Suitland, cultivated ground, September 8, 1899; later, several places 

 on the dumping grounds. 



