54. Nasturtium laciniata, Muhl. 



Lake-Cress. 



55. Dentaria laciniata, Muhl, 



Pepper-Iioot. 



5<3, Cardamine rhomboidea DC. 



Spring Cress. 



57. Cardamine rliomboidea. DC. 



var. purpurea, Torr. 



Spring Cress . 



58. Cardamine liirsu tit, 7 . 



SmaU Bitter Cress. 



59. Arabis Ludoviciana, Meyer. 



Rock Cress . 



60. Arabis lyrata, L. 



Rock Cress. 



61. Arabis laevigata, DC. 



Rook Cress. 



62 . Arabis Canadensis, L. 



Sickle-Pod. 



63. Arabis Drummoudii, Gray. 



Eock Cress. 



64. Barbarea vulgaris, R. Br. 



Yellow Rocket. 



65. Sisymbrium ollicinale, 8cop. 



Hedge Mustard. 



66. BrassicaSinapistrum, Boissier. 



Charlock. 



67. Brassica Siiiapis, 



White Mustard. 



68. Brassica nigra, 



Black Mustard. 



69. 



Brassica campestris, L. 



Turnip. 



Draba Garoliuiana, Walt. 



Whitlow-Grass. 



Draba verua, 



Wliitlow-Grass. 



Alyssum maritinium, L. 



Sweet Alyssura. 



Alyssum calyciiuim, L. 



Alyssum. 



Capsella Bursa-pastoris, Moeucb 



Sheplierd's Purse. 



Lepidium Virginicum, Ij. 



"V\"ild Peppergrass. 



Lepidium intermedium, G-ray. 



Peppoi-grass. 



Lepidium campesti'e, ij. 



Peppergrass. 



Caldle Americana, Nutt. 



American Sea- Rocket. 



73. 



74. 

 75, 

 76. 

 77. 

 78. 



79. Polauisia graveoLjns, Eaf. 



Polanisia. 



80. Viola rotundifolia, Miclix. 



Uouiid-Ijeavi.'d X'iolot. 



81. Viola lanceolata. L. 



Lance- Leaved Violet. 



82. Viola blanda, Willd. 



Sweet White Violet. 



