112 



INDEX 



Golden-rod 91 

 Oak 33 

 Great Bulrush 22 

 Burdock 86 

 Ragweed 85 

 St. John's-wort 61 

 Water Dock 36 

 Willow-herb 65 



Panicled 89 



Rough 90 

 Hawthorn 49 



English 49 

 Hay-scented Fern 2 

 Hazelnut 32 



Beaked 32 

 Heal-all 77 



Greater Bladderwort 80Heart-leaved Aster i 

 Duckweed 23 Twayblade 29 



Green Adder's Mouth 29 Willow 30 



Amaranth 37 Heart's-ease 62, 63 



Ash 72 Heath Family 69 



Brier 26 Heather, Beach 62 



Foxtail 16 Hedeoma 76 



Greenish-flowered Win- Hedge Bindweed 73 

 tergreen 70 Hyssop 79 



Grim the Collier 89 Mustard 46 



Gromwell 74 Nettle 77 



Common 75 Helianthemum 



62 



Ground Cherry 78 



Hemlock 6 



Ivy 77 



Laurel 69 



Pine 5 



Pink 73 

 Ground-nut 53 

 Groundsel 91 



Balsam 91 



Common 91 

 Grove Spear Grass 15 

 Gum, Black 68 



Sour 68 

 Gypsophila 38 



Low 38 

 Habenaria 28 

 Hackberry 33 

 Hackmatack 6 

 Hair Grass 10 

 Hairy Golden-rod 91 



Marsh Cress 46 



Rock Cress 44 



Wood Rush 24 



Helianthus 89 

 Heliopsis 



Alyssum 45 

 Hobble-bush 83 

 Hog Peanut 53 

 Hog-weed 85 

 Holly 58 



Family 58 



Mountain 58 

 Holy Grass 13 

 Honewort 66 

 Honeysuckle 82 



American Fly 82 



Bush 82 



Family 82 



Glaucous 83 



Tartarian 83 

 Hooked Crowfoot 42 

 Hop 33 



Clover 55 



Common 33 



Hornbeam 32 



Japanese 33 

 Hordeum 13, 16 



Heliotrope, Garden 84 Horehound, Water 76 

 Hellebore, American Hornbeam 32 



White 26 



False 26 

 Hemerocallis 25 

 Hemlock 7 



Ground 6 



Poison 66 



Water 66 

 Hemp 33 



Common 33 



Indian 72 



Nettle 75 



Water 37 

 Henbit 76 

 Hepatica 41 

 Heracleum 67 

 Herb Robert 56 

 Herd's Grass 15 

 Heteranthera 24 

 Hibiscus 61 



Hairy-stemmed Aster 86Hickory 31 



Halberd-leaved Tear- 

 thumb 35 

 Haloragidaceae 65 

 Hamamelidaceae 49 

 Hamamelis 49 

 Hardback 53 

 Harebell 84 

 Hare's Tail 22 

 Hawkweed 89 



Canada 89 



Orange 89 



Bitternut 31 

 Shagbark 31 

 Shellbark 31 

 Swamp 31 

 White-heart 31 



Hieracium 89 



Hierochloe 13 



High Blueberry 70 



American 32 



American Hop 32 



Hop 32 

 Horse Gentian 83 



Mint 76 

 Horse-chestnut 59 



Common 59 

 Horseradish 46 

 Horsetail 4 



Common 4 



Family 4 



Marsh 5 



Shore 5 



Wood 5 

 Horseweed 88, 90 

 Hound's Tongue 74 



Common 74 

 Houstonia 82 

 Huckleberry 69 



Black 69* 

 Hudsonia 62 

 Humulus 33 

 Hungarian Brome 

 Grass 11 



Grass 16 

 Huntsman's Cup 47 

 Husk Tomato 78 

 Hydrastis 42 



High-bush Blackberry 52Hydrocharitaceae 9 



Cranberry 83 Hydrocotyle 67 



Hoary Alder 31 ' Hydrophyllaceae 74 



