230 



INDEX OF GENERA. 



Morchella 190 



Morus 86 



Mucor 189 



Muhlenbergia US 



Mulgedium 56, 126 



Mycena 168 



Mycoporum 166 



Myosotis 67, 132 



Myrica 88 



Myrionema 208 



Myriophyllum 34 



Myriotrichia 208 



Myrothecium 185 



Mystrosporium 187 



Myurella 149 



Myxormia 181 



Myxosporium 182 



Mvxotrichum .. . 188 



N 



Nabalus 56 



Nsematelia 175 



Naias 100 



Nancoria 168 



Narthecium 104 



Nasturtium 8 



Neckera 148 



Nectria 196 



Negundo 23 



Neillia 28 



Nelutnbium 6 



Nemalion 206 



Nemaspora 182 



Nemopanthes 21 



Nepeta 78 



Nephrocytium 214 



Nephroma 161 



Nesisa 35 



Neslia 128 



Nicandra 69 



Nicotiana 132 



Nitella 204 



Nostoc 221 



Notothylas 158 



Nummularia 197 



Nuphar 6 



Nymphfea 6 



Nyssa 41 



Odontoschisma 156 



CEdogonium 211 



(Enothera 36 



Oidium 188 



Oldenlandia 44 



Omphalia 168 



Onoclea 137 



Ononis 129 



Onopordon 54, 131 



Onosmodium 67 



Opegrapha 166 



Ophiocytiura 213 



Ophioglossum 138 



Ophiotheca 178 



Opuntia 37 



Orchis 93 



Origanum 77 



Ornithogalum 103 



Ornithopus 130 



Orobanche 73 



Orontium 101 



Orthotrichum 145 



Oryzopsis 118 



Oscillaria 222 



Osinorrhiza 40 



Osmunda 138 



Ostrya 89 



Oxalis 20,129 



Oakesia 103 



Obolaria 65 



Odontia .. , 173 



Palmella 214 



Pana?olus 169 



Pandorina 213 



Panicum 124, 134 



Pannaria 162 



Panus 170 



Papaver 6,128 



Pardanthus 97 



Parietaria 87, 133 



Parmelia 160 



Parnassia 32 



Parthenium 131 



Paspalum 124 



Pastinaca 38 



Patellaria 193 



Pavonia 129 



Paxillus 169 



Pediastrum 213 



Pedicularis 73 



Pellia 157 



Pella?a 135 



Peltandra 100 



Peltigera 162 



Penicillium .. . 188 



Penium 216 



Pentstemon 71 



Penthorum 33 



Perichsena 178 



Periconia 186 



Peridermium , 184 



Pertussaria 163 



Pestalozzia 182 



Petunia 132 



Peziza 191 



Phacidium 195 



Phalaris 124,134 



Phallus 176 



Phascum 141 



Phaseolus 27,130 



Phegopteris 136 



Phlebia 173 



Phleum 117 



Phlox 66 



Phoma 179 



Phoradendron 84 



Phormidium 223 



Phragmicoma 157 



Phragmidium 183 



Phragmites 122 



Phryma 75 



Phyllactinia 189 



Phyllanthus 133 



Phyllitis 208 



Phyllophora 206 



Phyllostica 181 



Physalis 69,132 



Physcia 161 



Physcomitrium 146 



Physostegia 78 



Phytolacca 81 



Picris 132 



Pilea 87 



Pilidium 180 



Pimpinella 39 



Pmus 92 



Pirus 31 



Pistillaria 175 



Placodium 163 



Plagiochila 154 



Plagiothecium 152 



Plantago 79,133 



Platanus 87 



Platygyrium 149 



Pleuridium 141 



Pleurococcus 214 



Pleurottenium 217 



Pleurotus 168 



Pluchea 49 



Poa 120 



Podophyllurn "5 



Podosphara 190 



