46 FLORA OF BURLINGTON AND VICINITY 



DRABA (Dill.) L. Whitlow-grass 



I), arabisans Michx. Twisted Whitlow-grass. Rocky cliffs; rare. May, 

 June. Burlington, (Torrey). 



ERYSIMUM (Tourn.) L. Treacle Mustard 



E. CHEiRANTHOiDEs L. Worm-seed Mustard. Fields and railroad yards; 

 occasional. July-Oct. 



LEPIDIUM (Tourn.) L. Pepperwort. PeppErgrass 



L. APETALUM Willd. Wild Peppergrass. Dry soil, especially along rail- 

 roads ; common. June-Oct. 



L. campestre (L.) R. Br. Field or Cow Cress. Fields and roadsides; 

 rare. June. Burlington, (Jones). 



L. viRGiNicuM L. Wild Peppergrass. Dry soil, especially along rail- 

 roads; common. June-Oct. 



LOBULARIA Desv. SwEET Alyssum 



L. MARiTiMA (L.) Desv. Occasionally spontaneous in gardens and 

 waste places. July-Sept. 



RADICULA (Dill.) Hill. Water Cress 



E. aciuatica (Eat.) Robins. Lake Cress. Lakes and rivers; rare. July, 

 Aug. La Plot River, Shelburne, (Pringle) ; Malletts Creek, Col- 

 chester, (Griffin). 



K. Armoracia (L.) Robins. Horseradish. A frequent escape to moist 

 grounds. May, June. 



1{. palustris (L.) Moench. Marsh Cress. Wet places; occasional. 



June, July. Burlington, (N. F. F.). 



li. palnstris (L.) Moench, var. hispida (Desv.) Robins. Hairy Marsh 

 Cress. Wet places; frequent. June, July. 



K. SYLVESTRis (L.) Druce. Yellow Cress. A weed in cultivated ground 

 and wet meadow, South Burlington, (N. F. F.). June. 



SISYMBRIUM (Tourn.) L. HEDGE Mustard 



S. ALTissiMUM L. Tumble Mustard. First introduced a few years ago, 

 but already becoming a common weed in fields, roadsides, etc. 

 June-Oct, 



