112 Holt ii Additions to the, Fiord of Washington. 



270. Poterium Canadense Benth. & Hook. 



Swamp near Bladensburg. H. W. Henshaw. Holmead 

 Swamp. Lester F. Ward and the author. 



282. Crataegus Oxyacantha L. 



Corcoran Woods ; a single shrub. The author. 

 285. Crataegus parvifolia Ait. 



Beyond Silver Hill. G. W. Oliver. 



SAXIFRA GA CE. E. 

 289. Mitella diphylla L. 



South bank of Cascade Run, near the mouth. E. S. Burgess. 

 291. Chrysospleuium Americanum Sc'lnvcin. 



Rock Creek, nearly opposite Crystal Spring. Lester F. Ward. 

 Several places in the ravines above Aqueduct Bridge, on the 

 Virginia shore. The author. 



DROSERACEM 

 300. Drosera rotundifolia L. 



Sarracenia Swamp and near Fort Ethan Allen. II. W. llen- 

 shaw. Common in swamps east of Silver Hill. G. W. Oliver. 



MELASTOMA CEJE. 



* 306a. Rhexia Mariana L. 



Near Accotink, Fairfax County, Virginia. William Hunter. 

 Clearing in the pine woods, Marlborough road. G. W. Oliver. 



LYTHRACEsE. 

 307. Ammania humilis Michx. 



Swamp in Piney Branch woods, and very common in swamps 

 between Eckington and Brookland. The author. 



ONAGRACEsE. 



* 316. CEnothera pumila L. 



Brentwood road, opposite- Eckington. Lester F. Ward. Dry 

 hills near Fort Myer ; flowering in the second week of May. The 

 author. 



