110 Holm — Additions to tlie Flora of Washington. 



450. Aster umbellatus Mill. 



Terra, Cotta swamp, near tlic railway track. Swamps below 

 Freedman's Village. E. S. Burgess. 



453. Erigeron bellidifolius Muhl. 



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



457. Baccharis halimifolia L. 



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

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

 liam Hunter. Oiiposite 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. 



*465a. Silphium lacinia'um L. 



At the southeastern end of Woodley Bridge ; first discovered 

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



*472a. Heliopsis scabra Dun. 



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

 Burgess. 



473. Eclipta alba Ilassk. 



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

 Burgess. 



494a. Bidens connata Muhl. 



Accotink, Fairfax County, Virginia. William Hunter. 



497a. Qalinsoga parviflora Cav. 



Corner of Pihode Island avenue and S street. Piney Branch, 

 above the l»rid.c at Fourteenth street. E. S. Burgess. Massa- 

 chusetts avenue, between Fourteenth and Fifteenth streets. The 

 author. 



