142 



INDEX. 



Knapweed 



47 



Knawel 



05 



Knotweed 



(i(i 



Krigia 



47 



Lactuca 



49 



Ladies' Tresses 



78 



Lady's .Slipper 



79 



Lady's Thumb 



67 



Lambkill 



53 



Larkspur 



5 



Laurel, American 



53 



Mountain 



53 



Sheep 



53 



Leather Leaf 



52 



Lecanora 



134 



Lechea 



10 



Leersia 



98 



Lemanea 



133 



Lemna 



86 



Leontodon 



48 



Leonurus 



04 



Leotia 



137 



Lepidium 



9 



Leptotrichum 



118 



Leskea 



123 



Lespedeza 



21 



Lettuce 



49 



White 



48 



Leucobryum 



118 



Leucodon 



122 



Leucothoe 



52 



Lever Wood 



73 



Life-of-Man 



34 



Ligustrum 



56 



Lilac 



56 



Lilium 



82 



Lily 



82 



Day 



80 



Lily of the Valley 



81 



Limnanthemum 



57 



Linaria 



59 



Linden 



14 



Lindera 



68 



Linum 



14 



Liparis 



77 



Liquorice, Wild 



37 



Live.for-ever 



29 



Liver-leaf 



3 



Lobelia 



50 



Locust, Common 



20 



Locust-tree 



20 



Loiucera 



30 



Loosestrife 



31, 55 



False 



31 



Swamp 



31 



Lousewort 



61 



Love Apple 



58 



Ludwigia 



31 



Luzula 



84 



Lychnis 



11 



Lycopersicum 



58 



Lycopodium 



114 



Lycopus 



63 



Lyngbya 



127 



Lysimachia 



55 



Lythrum 



31 



Magnusiella 



137 



Maianthemum 



81 



Maidenhair 109 i 



False 109 



Mallow 18 



Malva 13 



Maple 17 



Marigold Bur 45 



Marsh 5 



Water 45 



Marsh Marigold 5 



Mayflower 52 



Mayweed 45 



Meadow Beauty 31 



Meadow Rue 4 



Meadow Sweet 23 



Medcola 82 



Medicago 20 



Medick 20 



Melampyrum 61 



Melilot 20 



Melilotus 20 



Mentha 02 



Menyanthes 57 

 Mercury, Three-seeded 68 



Mermaid Weed 30 



Mexican Tea 05 



Microstylis 77 



Mignonette 9 



Mikania 38 



Milfoil, Water 30 



Milkweed 56 



Milkwort 18 



Millet, True 97 



Mimulus 59 



Mint 62 



Mountain 63 



Miscanthus 98 



Mitchella 37 



Mnium 121 



Mocker-Nut 70 



Mock Orange 29 



Molhigo ' 32 



Moneses 54 



Moneywort 55 



Monkey Flower 59 



Monotropa 54 



Moonwort 113 



Morning Glory 58 



■Wild 58 



Morus 69 



Motherwort 64 



Mougeotia 129 



Mugwort 46 



Muhlenbergia 100 



Mulberry 69 



Mullein 59 



Mustard, Black 9 



Hedge _S 



Myosotis 57 



Myrica 71 



Myriophyllum 30 



Naiad 87 



Naias 87 



Nasturtium S 



Numopanthes 16 



Nepeta 63 



Nettle 69 



False 69 



Hedge 64 



Hemp 64 



New jersey Tea 

 Nightshade 



16 



59 



Enchanter's 



32 



Nitella 



125 



Nostoc 



128 



Nuphar 



6 



Nymphaia 



6 



Nyssa 



35 



Oak 



73 



Poison 



18 



Oakesia 



82 



Oat 



102 



CLdogonium 



131 



CEnothera 



32 



Onion 



SO 



Onoclea 



112 



Ophiocytium 



130 



Orange-grass 

 Orchis, Ragged-fringec 

 White-f ringed 



13 



79 



79 



Ornithogalum 



80 



Orpine 



29 



Orthotrichum 



119 



Oryzopsis 



100 



Oscillatoria 



127 



Osmorrhiza 



33 



Osmunda 



112 



Ostrya 

 Oxalis 



73 



15 



Ox-eye Daisy 



46 



Paionia 



6 



Pan i cum 



96 



Parmclia 



133 



Parsnip 



32 



Water 



33 



Partridge Berry 



37 



Paspalum 



96 



Pastinaca 



32 



Peach 



23 



Pea, Hoary 



20 



Peanut, Hog 



22 



Pear 



27 



Peat Moss 



115 



Pediastrum 



130 



Pedicularis 



61 



Peltandra 



85 



Peltigera 



134 



Pennyroyal, Bastard 

 Mock 



62 



63 



Pennywort, Water 



33 



Penthorum 



29 



Peony 



6 



Pepperbush, Sweet 



53 



Peppergrass 



9 



Pepperidge 



35 



Pepper, Water 



67 



Peronospora 



136 



Pertusaria 



134 



Petunia 



59 



Peziza 



137 



Phegopteris 



110 



Philadelphia 



29 



Philonotis 



120 



Phleuin 



100 



Phormidium 



127 



Phyllosticta 



137 



Physcia 



133 



Physcomitrium 



120 



