Steele Additions to the Flora of Washington. 63 



i. Clematis ochroleuca Ait. 



On the ridge at Four Mile Run; hill near St. Asaphs; Arlington near 

 Naucks, and woods west of Georgetown (one plant). 

 13. Ranunculus pusillus Poir. 



Border of pond, Bladensburg pike, May 4, 1898. 

 12. Ranunculus obtusiusculus Raf. 



Eastern Branch marsh at Bennings road, south side. 

 22. Ranunculus acris L. 



Though occasionally found, I doubt if this is well established at any 

 point within our range. 

 15. Ranunculus micranthus Nutt. 



Hillside above Chain Bridge; near Kendall Green. 

 6. Thalictrum purpurascens L. 



Feeder Dam Island; Plummer's Island; Seven Locks. This is a gre 

 garious plant of rank growth, although not very tall. 

 *7o. Thalictrum coriaceum (Britton) Small. 



Common on hillsides, among thickets, etc. 

 5. Thalictrum dioicum L. 



Well-shaded banks, Rock Creek Park; Little Falls on the Virginia 

 side. 

 40. Papaver dubium L. 



Plummer's Island; abundant along New-cut road near Conduit road 

 and on a neighboring estate May 30, 1899. 

 45. Fumaria officinalis L. 



Occurs occasionally in waste ground, and was found in considerable 

 quantity in the truck land near Belleview Magazine, and even on the 

 uncultivated hillsides, in 1898. 

 *j6a. Lepidium apetalum Willd. 



Waste ground, Holmead Manor, May 15, 1898; dumping ground, river 

 front, May 28, 1898; Eckington, May 25, 1900. 

 78. Thlaspi arvense L. 



Potomac flats, one specimen, 1900. This plant is evidently not estab 

 lished here. 

 *78. Thlaspi perfoliatum L. 



Waste ground north of Virginia avenue, May 15, 1898; a considerable 

 patch. 

 68a. Sisymbrium altissimum L. 



Below the old Naval Observatory, in fruit, June 7, 1897; since seen in 

 several places, but apparently not spreading. 

 *74. Brassica Napus L. 



Becoming very abundant. 

 *74&. Brassica juncea (L.) Coss. 



Chain Bridge station, July 4, 1896; later at Anacostia and on dumping 

 ground on the Potomac flats. 



U-BIOL. Soc. WASH. VOL. XIV, 1901. 



