INDEX TO CHAPTER VI l 



257 



41. Dandelion (^Ta7-axacuni offici- 



nale), yellow. 



42. Thistle i^Cnicus lanceolatus), 



crimson. 



43. Canada Thistle {Cnicus arven- 



si's), purplish. 



44. Pasture Thistle {Cnicus puini- 



his), rose. 



45. Cnicus altissimus, rose. 



46. Cnicus korridulus, yellow. 



47. Venus's Looking-glass {Specula- 



ria perfoliata), blue. 



48. Horse -nettle {Solatium Caroli- 



ncnst'), violet. 



49. Common Nightshade (^Solanum 



nigrum), white. 



50. Jamestown-weed. Thorn Apple 



(^Datiu-a Stramonium), white. 



51. Mullein {Verbascum Thapsus), 



yellow. 



52. Butter-and-eggs {Linaria vul- 



garis), yellow. 



53. Neckweed. Purslane Speedwell 



( Veronica pcregrina), whitish. 



54. Gill-over-the-ground. Ground 



Joy (iVcpeta Glechoma), blue. 



55. Catnip {A'epeta Cataria), white. 



56. Dead-nettle {lamium amplexi- 



caule), purplish. 



57. Amaranth. Rough Pigweed 



{A maranthus ret rojl e xtcs), 

 green. 



58. Thorny Amaranth {Amaranthus 



spinosus). 



5g. Tumble-weed {Amaranthus al- 

 ii us). 



60. Pigweed. Lamb's -quarters 

 {Chetiopodium album'), green. 



6r. 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 {Rumex 



Acetosella), reddish. 



68. Knotweed. Door-weed {Polygo- 



niun 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 



Conziolvulus), greenish. 



73. Stinging JN'ettle {Urtica dioica), 



greenish. 



74. Slender Nettle {Urtica gracilis). 



75. Small Nettle {Urtica urens). 



