FLORA OF WASHINGTON AND VICINITY. 151 



67. Hesperis matronalis, L. 



68. Sisymbrium officinale, Scop. 



69. Sisymbrium Thaliana, Gay. 



70. Sisymbrium AlUaria, Scop. 



71. Erysimum cheirauthoides, L. 



72. Camelina saliva, Crantz. 



73. Brassica Sinapistrum, Boiss. 



74. Brassica nigra, Kocli. 



75. Capsella Bursa-pastoris, Moench. 



76. Lepidium Virginicum, L. 



77. Lepidium eampestre, L. 



78. Thlaspi arvense, L. 



79. Raphanus sativus, L. 



80. Helianthemum Canadense, Michx. 



81. Lechea minor, Walt. 



82. Viola lanceolata, L. 



83. Viola primulsefolia, L. 



84. Viola cucullata, Ait. 



85. Viola cucullata, Alt., var. palmata, Gray. 



86. Viola cucullata, Ait., var. cordata, Gray. 



87. Viola sagittata. Ait. 



88. Viola pedata, L. 



89. Viola pedata, L., var. bicolor, Pursh. 



