172 



THE PLANT WORLD. 



46. Rudbeckia hirta L. 



47. Sonchus oleraceus L. (14) 



48. Taraxacum Taraxacum L. 



49. Xanthium Canadense Mill. 



50. Apocynum cannabinum L. 



51. Asclepias Syriaca L. 



52. Cynos'lossum afficinale Ij. 



53. Echium vulgare L. (10) 



54. Lappula Lappula L. 



55. Convolvulus arvensis L. 



56. Convolvulus sepium L. 



57. Ipomoea pandurata L. 



58. Datura Tatula L. 



59. Physalis Virginiana Mill. 



60. Solanum Carolinense' L. 



61. Solanum rostratum Dun. 



62. Linaria Linaria L. 



63. Verbascum Blattaria Ij. 



64. Verbascum Thapsus L. 



65. Veronica peregrina L. 



66. Orobanche ramosa L. 



67. Brunella vulgaris L. (18) 



68. Lamium amplexicaule L. 



69. Leonurus Cardiaca L. 



70. Nepeta Cataria L. 



71. iNepeta hederacea L. 



72. Plantago lanceolata L. 



(15) 



(1-) 



(19) 



74. Amarantus albus L. 



75. Amaranthus blitoides Wat. 



76. Amaranthus chlorostachys Wild. 



77. Amaranthus retroflexus L. 



78. Chenopodium album L. (20) 



79. Chenopodium ambrosoides L. 



80. Phytolacca decaiidra L. 



81. Polygonum aviculare L. (21) 



82. Polygonum Convolvulus L. (22) 



83. Polygonum Pennsylvanicum L. 



84. Rumex acetosella L. (23) 



85. Rumex crispus L. 



86. Acalj-pha Virginica L. 



87. Euphorbia Preslii Guss. 



88. Euphorbia maculata L. 



89. Allium vineale L. 



90. Cyperus esculentus L. 



91. Agropyrum repens L. (24) 



92. Bi'omus secaliinis L. 

 .93. Bromus tectorum L. 



94. Cenchus tribuloides L. 



95. Eleusine Indica L. 



96. Panicum capillare L. 



97. Panicum crus-galli L. 



98. Panicum sanguinale L. 



99. Chamaeraphis glauca L. 

 100. Chamaeraphis viridis L. 



73. Plantago Rugelii Dec. 



It is seen that there is less than one quarter of the species common 

 to the two lists. A large per cent of the crowfoots and mustards are 

 alike to the two countries. We do not have the two poppies that are 

 beatifully and ruinously conspicuous in the English fields, and no 

 geraniums with us stand for the three species of the British Isles. The 

 number of leguminous weeds of the worst class is large (7) in Doctor 

 Smith's list; in the American century it is limited to the Trefoil com- 

 rnon to both lists, and the white sweet clover 



We have none of the rose family that is ranked in the worst hun- 

 dred, while the English list includes seven species, three of them being 

 potentillas and represented with us by the cinquefoil of the infertile 

 open ground. The wild carrot is common to both lists; but not so the 

 "fool's parsley" (^yEthum cynapium L.) of Great Britain and wild 

 Parsnip with us. 



Of the great weed order Compositae there are twenty re})resenta- 

 tives in Doctor Suiith's list, and twenty-one in the American century 

 with but five species in common, r^amely, yarrow, ox-eye daisy, field 



