64 Steele Additions to the Flora of Washington. 



52. Barbarea Barbarea (L.) MacM. 



A form corresponding to B. vulgaris arcuata A. Gray was collected on 

 a roadside at Cleveland Park, May 14, 1899. 

 52a. Barbarea stricta Andrx. 



Potomac flats near dumping ground, May 11, 1898. 

 49a. Roripa hispida (I)esv.) Britten. 



Jackson City, August 1, 1899. 

 62^. Cardamine arenicola Britton. 



Very abundant in moist ground on the Potomac flats east of the rail 

 road, 1900. 



A Cardamine appearing intermediate between this and C. Pennsyl 

 vania and growing on dry wooded hills requires further attention. 

 62a. Cardamine parviflora L. 



Woods, Kendall Green. 

 72a. Camelina microcarpa Andrx. 



This name applies to all the specimens I have seen, and probably to 

 all those formerly taken as mtiea. This plant was observed quite over 

 running a field on New-cut road east of Conduit road, May 30, 1899. 

 56. Arabis patens Sulliv. 



South slope of the High Island ridge, in fruit, May 21, 1898. 

 71. Erysimum cheiranthoides L. 



Plummer's Island, June 22, 18VJ7: Potomac Hats, July 10, 1899. 

 *7ia. Conringfa orientals (L.) Dumort. 



A single specimen on dumping ground, rear of propagating grounds, 

 in 1899. 



*79a. Cleome spinosa L. 



Dumping ground on New-cut road, July 14, 1890. Seen in the previous 

 year near Pennsylvania avenue southeast, and in 1900 on dumping 

 ground along the river front. 

 249. Spiraea salicifolia L. 



This can no longer be considered rare, as it has been observed in Ken- 

 il worth swamp in small quantity; at the foot of the long hill on the 

 Glen Echo railroad; in a swamp in south Arlington; near Sligo, Mary 

 land (Pollard); and on the edge of a bog north of Berwyn. 

 254. Rubus argutus Link. 



Our common high-bush blackberry. I am as yet uncertain whether 

 or not we have R. nigrobaccus Bailey. 

 *2s6. Rubus trivialis Michx. 



Bennings, and swamp above Hyattsville. 

 254. Rubus Enslenii Tratt. (It. rillosu* humifusus of Ward's Flora.) 



High ground near Dalecarlia reservoir, May 15, 1896; Seven Locks, 

 May, 1897. Later found at Lakeland, etc., and probably very common. 

 Trattenick's and Torrey's type specimens, as shown in Bailey's "Evolu 

 tion of our Native Fruits," pp. 363 and 376 differ as to the form of the 

 leaves. Both forms can be duplicated from our material. Our plant has 



