ILLUSTRATIONS. 



Page. 



Fig. 1. Burdock, flowering plant 11 



2. Burdock, first year's growth 12 



3. Dandelion 13 



4. Dandelion root 14 



5. Yellow dock, first year's growth 15 



6. Broad-leaved dock, first year's growth 16 



7. Leaf, fruiting spike, and root of hroad-leaved dock 17 



8. Yellow dock root 18 



9. Couch grass 19 



10. Pokeweed 21 



11. Pokeweed, flowering and fruiting branch 22 



12. Pokeroot 22 



13. Foxglove 23 



14. Mullein 25 



15. Lobelia 26 



16. Tansy 28 



17. Gum plant 28 



18. Scaly grindelia 29 



19. Boneset 30 



20. Catnip 32 



21. Hoarhound 33 



22. Hoarhound, flowering top 34 



23. Blessed thistle 35 



24. Yarrow 36 



25. Canada fleabane 37 



26. Jimson weed 38 



27. Leaves, flower, and capsules of jimson weed 39 



28. Poison hemlock 40 



29. American w< >rmseed 41 



30. Black mustard 43 



31. White mustard 44 



6 



188 



