Additions to the Flora of Washington. 123 



&LANTA&INEJB. 



745. Plantago Patagonica Jacq., var. aristata Gray. 

 Woodley Park. G. B. Sudworth. 



POLYGONACEJE. 

 773. Polygonum tenue Michx. 



Lanier Heights. E. S. Burgess. 

 x 775. Polygonum Hartwrightii Gray. 



Potomac flats just below Outlet Lock ; not seen in flower. F. 

 V. Coville. 



A RISTOL CHI A CE^. 

 788. Aristolochia Serpentaria L. 



Seven Locks. E. S. Burgess. Observed in several places in 

 woods, but always scattered. Lester F. Ward, G. W. Oliver, and 

 the author. 



LORANTHACEM 



794. Phoradendron flavescens Nutt. 



Growing upon Acer rubrum, Quercus tinctoria, and Q. coccinea. 

 Woodlawn, near Mount Vernon, Virginia. William Hunter. 

 On Acer rubmm, five miles west of Falls Church, Virginia. Les- 

 ter F. Ward. 



EUPHORBIACE.E. 



800. Euphorbia commutata Eng. 



Cystopteris Run. E. S. Burgess. Virginia shore of the Poto- 

 mac above Aqueduct Bridge. The author. 



801. Phyllanthus Carolinensis Walt, 

 Rediscovered in Corcoran Woods. G. W. Oliver. 



URTICACEM 

 816. Parietaria Pennsylvanica Muhl. 



In a thicket between Aqueduct Bridge and Chain Bridge, 

 near the Canal road. Lester F. Ward and the author. 



1C BIOT-. Soc., WASH., Vor,.'VJI, 1892. 



