46 FLORA OF BURLINGTON AND VICINITY 



DRABA (Dill.) L. Whitlow-grass 



D. arabisaus 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. Pepper wort. 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 



R. aquatica (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. 



U, palustris (L.) Moench. Marsh Cress. Wet places; occasional. 

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



K. palustris (L.) Moench, var. hispida (Desv.) Robins. Hairy Marsh 

 Cress. Wet places; frequent. June, July. 



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

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



SISYMBRIUM (Tourn.) L. Hedge Mustard 



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

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

 June-Oct. 



