ILLUSTRATIONS 



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Fig. 1. Sweet fern (Comptonia peregrina), leaves, male and female catkins 9 



2. Liverleaf (Hepatica hepatica), flowerins; plant 10 



3. Celandine {Chelidonium mnjus), leaves, flowers, and seed pods 11 



4. Witch-hazel (Hamamelis virginiana), leaves, flowers, and capsules 12 



5. American senna (Cassia marilandica), leaves, flowers, and seed pods. . 13 



6. Evening primrose (Oenothera biennis), leaves, flowers, and capsules... 14 



7. Yerba santa (Eriodictyon calif ornicum) , leaves and flowers 15 



8. Pipsissewa and spotted wintergreen (Chimaphila iimbellata and C. macu- 



lata), flowering and fruiting plants 16 



9. Mountain laurel (Kalmia latifolia), leaves and flowers 17 



10. Gravel plant (Epigaea repens), leaves and flowers 18 



11. Wintergreen (Gaultheria procumbens) , flowering and fruiting plants. . . 19 



12. Bearberry (Arctostaphylos uva-ursi), leaves and fruitsl 20 



13. Buckbean (Menyanthes trifoliata), flowering plant 21 



14. Skullcap (Scutellaria lateriflora), flowering branch, showing also seed 



capsules 22 



15. Horehound (Marrubium vulgare), leaves, flowers, and seed clusters. . . 23 



16. Catnip (Nepeta cataria), leaves and flowers 24 



17. Motherwort (Leonurus cardiaca), leaves, flowers, and seed clusters 25 



18. Pennyroyal (Hedeoma pulegioides) , leaves and flowers'. 26 



19. Bugleweed (Lycopus virginicus), leaves and flowers 27 



20. Peppermint (Mentha piperita), leaves and flowers 28 



21. Spearmint (Mentha spicata), leaves, flowers, and running rootstock 29 



22. Jimson weed (Datura stramonium), leaves, flowers, and capsules 30 



23. Balmony (Chelone glabra), leaves and flowers 31 



24. Common speedwell ( Veronica officinalis), leaves and flowers 32 



25. Foxglove (Digitalis purpurea), leaves and flowers 33 



26. Squaw vine ( Mitchella repens), leaves and fruits 34 



27. Lobelia (Lobelia injlata), leaves, flowers, and inflated capsules 35 



28. Boneset (Eupatorium per/oliatum) , leaves and flowers 36 



29. Scaly grindelia (Grindelia squarrosa), leaves and flowers 37 



30. Canada fleabane (Leptilon canadense), flowering tops 38 



31. Yarrow (Achillea millefolium), leaves and flowers 39 



32. Tansy ( Tanucctum vulgare), leaves and flowers 40 



33. Wormwood (Artemisia absinthium), leaves and flowers 41 



34. Coltsfoot (Tussilago farfnra) , plant showing root, leaves, and flowers... 42 



35. Fireweed (ErecKthites hieracifolia), leaves and flowering tops 43 



36. Blessed thistle ( Cnicus benedictus), leaves and flowers 44 



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