142 
Knapweed 
Knawel 
Knotweed 
Krigia 
Lactuca 
Ladies’ Tresses 
Lady’s Slipper 
Lady’s Thumb 
Lambkill 
Larkspur 
Laurel, American 
Mountain 
Sheep 
Leather Leaf 
Lecanora 
Lechea 
Leersia 
Lemanea 
Lemna 
Leontodon 
Leonurus 
Leotia 
Lepidium 
Leptotrichum 
Leskea 
Lespedeza 
Lettuce 
White 
Leucobryum 
Leucodon 
Leucothoe 
Lever Wood 
Life-of-Man 
Ligustrum 
Lilac 
Lilium 
Lily 
Day 
Lily of the Valley 
Limnanthemum 
Linaria 
Linden 
Lindera 
Linum 
Liparis 
Liquorice, Wild 
Live-for-ever 
Liver-leaf 
Lobelia 
Locust, Common 
Locust-tree 
Lonicera 
Loosestrife 
False 
Swamp 
Lousewort 
Love Apple 
Ludwigia 
Luzula 
Lychnis 
Lycopersicum 
Lycopodium 
Lycopus 
Lyngbya 
Lysimachia 
Lythrum 
Magnusiella 
Maianthemum 

INDEX. 
Maidenhair 
False 
Mallow 
Malva 
Maple 
Marigold Bur 
Marsh 
Water 
Marsh Marigold 
Mayflower 
Mayweed 
Meadow Beauty 
Meadow Rue 
Meadow Sweet 
Medeola 
Medicago 
Medick 
Melampyrum 
Melilot 
Melilotus 
Mentha 
Menyanthes 
Mercury, Three-seeded 
Mermaid Weed 
Mexican Tea 
Microstylis 
Mignonette 
Mikania 
Milfoil, Water 
Milkweed 
Milkwort 
Millet, True 
Mimulus 
Mint 
Mountain 
Miscanthus 
Mitchella 
Mnium 
Mocker-Nut 
Mock Orange 
Mollugo 
Moneses 
Moneywort 
Monkey Flower 
Monotropa 
Moonwort 
Morning Glory 
Wild 
Morus 
Motherwort 
Mougeotia 
Mugwort 
Muhlenbergia 
Mulberry 
Mullein 
Mustard, Black 
Hedge 
Myosotis 
Myrica 
Myriophyllum 
Naiad 
Naias 
Nasturtium 
Nemopanthes 
Nepeta 
Nettle 
False 
Hedge 
Hemp 
New Jersey Tea 
Nightshade 
Enchanter’s 
Nitella 
Nostoc 
Nuphar 
Nympheza 
Nyssa 
Oak 
Poison 
Oakesia 
Oat 
(Edogonium 
CE£nothera 
Onion 
Onoclea 
Ophiocytium 
Orange-grass 
Orchis, Ragged-fringed 79 
White-fringed 
Ornithogalum 
Orpine 
Orthotrichum 
|; Oryzopsis 
Oscillatoria 
Osmorrhiza 
Osmunda 
Ostrya 
Oxalis 
Ox-eye Daisy 
Peonia 
Panicum 
Parmelia 
Parsnip 
Water 
Partridge Berry 
Paspalum 
Pastinaca 
Peach 
Pea, Hoary 
Peanut, Hog 
Pear 
Peat Moss 
Pediastrum 
Pedicularis 
Peltandra 
Peltigera 
Pennyroyal, Bastard 
oc 
Pennywort, Water 
Penthorum 
Peony 
Pepperbush, Sweet 
Peppergrass 
Pepperidge 
Pepper, Water 
Peronospora 
Pertusaria 
Petunia 
Peziza 
Phegopteris 
Philadelphus 
Philonotis 
Phleum 
Phormidium 
Phyllosticta 
Physcia 
Physcomitrium 
79 
80 

