116 Holm Additions to the Flora of Washington. 



450. Aster umbellatus Mill. 



Terra Cotta swamp, near the railway track. Swamps below 

 Freedman's Village. E. S. Burgess. 



453. Erigeron bellidifolius Muhl. 



Woodley Park. Lester F. Ward. Fort Tottcn. The author. 



457. Baccharis halimifolia L. 



Near Aceotink Station, Virginia, on the Alexandria and Fair- 

 fax railway ; flowering in the second week of September. Wil- 

 liam Hunter. Opposite Marshall Hall. G. W. Oliver. 



*459. Antennaria plantaginifolia Hook., var. monocephala Gray. 

 Pierce's Mill Bridge, April 28, 1889. G. W. Oliver. 



462. Gnaphalium purpureum L. 



Potomac shore. Lester F. Ward. Common in Terra Cotta 

 ' Swamp. Brookland. The author. 



465. Silphium trifoliatum L. 



Still persisting near Woodley Bridge, October, 1888. E. S. 

 Burgess. 



*465r/, Silphium laciniaUim L. 



At the southeastern end of Woodley Bridge ; first discovered 

 by J. W. Chickering ; found more recently by E. S. Burgess. 



*472a. Heliopsis scabra I)un. 



Near Spout Run ; flowering in the first week of October. E. S. 

 Burgess. 



473. Eclipta alba Hassk. 



Piney Branch, above the bridge at Fourteenth street. E. S. 

 Burgess. 



494a. Bidens connata Muhl. 



Accfctink, Fairfax County, Virginia. William Hunter. 



497(7. Galinsoga parviflora Cav. 



Corner of Rhode Island avenue and S street. Pincy Branch, 

 above the brid.e at Fourteenth street. E. S. Burgess. Massa- 

 chusetts avenue, between Fourteenth and Fifteenth streets. Tin; 

 author. 



