^tede — AJ.dltlotis to thr Flora of 'Washington. 67 



i25. Vicia tetrasperma (L.) Moench. 

 Takoma Park, 1896; Giesboro road, 1899. 



226. Vicia liirsuta (L.) Koch. 



Waste ground, Potomac Hats; among the truck lands below Anacostia. 

 224. Vicia sativa L. 



I have plants with narrow and with broad leaves; the latter are perhaps 

 distinct from V. angustifoUa Roth, but the separation is not easy. 



*229a. Vigna Catjang L. 



Found occasionally on dumping grounds. 

 23irr Falcata Pitcheri (Torr. & (iray) Kuntze. 



Abundant in the river swamps; also occurs near streams back from 

 the river. 



229/j. Dolichos Lablab L. 



F(Huid on several occasions on dumping grounds. 



153a. Oxalis corniculata L. 



Abundant on the Agricultural grounds not far from the building. 

 Collected with flowers and fruit December 4, 1900. 



i53/>. Oxalis filipes Small. 



Common. lUooms from May to the end of September, the stem grad- 

 ually elongating and falling over, but not rooting. My specimens show 

 pretty clearly, however, that this plant develops some short, creeping 

 stems. 



153. Oxalis stricta L. 



Common. Begins blooming a little earlier than 0. filipes, and seems 

 to hnish mainly by the end of June, but it is found more or less in flower 

 throughout the summer, the stem elongating moderately. It forms lit- 

 tle clumps of stems with a decumbent base which may be two or three 

 inches long. Besides the transverse ridges there are two well-defined 

 longitudinal ridges on tlie face of tlie seed and a groove on its margins. 



I53r. Oxalis cymosa Small. 



Very common. Begins to blossom lali^ in ]\lay and continues through- 

 out the season, the stem eloiigaling grcally. 



153''. Oxalis grandis Small. 



Plummer's Island. ,lune 21. 1S,»7. 



144a. Linum medium (Planch.) Britton. 



jMore abundant than J.. Virginidninn, the species easily distinguish- 

 able. The dillerence between these plants was clearly explained in 

 Ward's Flora. 



*ggh. Polygala cruciata L. 



Brightwood swamp, August 16 and September 22, 1897. Also in the 

 Paint Branch SAvamps in some quantity, and at Lakeland. 



97. Polygala viridescens L. 



Flats opposite Ale.vandria, .luly 1, 1899. Only station found i)y me. 



t 



