INDEX TO CHAPTER VII 



2S7 



41. Dandelion (^Taraxacum offici- 



nale), yellow. 



42. Thistle {^Cnicus lanceolatus), 



crimson. 



43. Canada Thistle {jCnicus arven- 



sis), purplish. 



44. Pasture Thistle (Cnicas pumi- 



lus), rose. 



45. Cnicus altissimiis, rose. 



46. Cnicus horridulus, yellow. 



47. Venus's Looking-glass {Specula- 



ria perfoHata), blue. 



48. Horse -nettle (Solanum Caroli- 



nense), violet. 



49. Common Nightshade (^Solanum 



nigrum), white. 



50. Jamestown-weed. Thorn Apple 



(^Datura Stramonium), white. 



51. Mullein (Verbascum Thapsus), 



yellow. 



52. Butter-and-eggs (Linaria vul- 



garis), yellow. 



53. Neckweed. Purslane Speedwell 



( Veronica peregrina), whitish. 



54. Gill-over-the-ground. Ground 



Joy (Nepeta Glecltoma), blue. 



55. Catnip (Nepeta Cataria), white. 



56. Dead-nettle {Lamium amplexi- 



caule), purplish. 



57. Amaranth. Rough Pigweed 



(Amaranthus retrojlexus), 

 green. 



58. Thorny Amaranth (Amaranthus 



spinosus). 



5g. Tumble-weed (Amaranthus al- 

 ius). 



60. Pigweed. Lamb's -quarters 

 (^Chenopodium album), green. 



61.. Russian Thistle (Salsola Tra- 

 gus). 



62. Scoke. Pokeweed. Garget. 



Pigeon-berry (Phytolacca de- 

 candra), white. 



63. Curled Dock (Rumex crispus), 



green. 



64. Bitter Dock (Rumex obtusifo- 



lius). 



65. Red-veined Dock (Rumex san- 



guineus), 



66. Smaller Green Dock (Rumex 



conglomeratus). 



67. Field or Sheep Sorrel (Jiumex 



Acetosella), reddish. 



68. Knotweed. t)oor-weed (Polygo- 



num aviculare), pink. 



69. Erect Knotweed (Polygonum 



erectum), yellow. 



70. Pennsylvania Persicaria (Polygo- 



num Pennsylvanicum), dark 

 pink. 



71. Lady's-thumb (^Polygonum Per- 



sicaria). 



72. Black Bindweed (Polygonum 



Convolvulus), greenish. 



73. Stinging Nettlfe (Urtica dioica), 



greenish. 



74. Slender Nettle ( Urtica gracilis). 



75. Small Nettle (Urtica urens). 



