159 



Phylloplaora, 12 

 Phyllosticta, 33 

 Physalis, 134 

 Physalodes, 134 

 Physostegia, 132 

 Physcia, 44 

 Physcomitrium, 52 

 Phytolacca, 90 

 Picea, 60 

 Pieris, 124 

 Pimpinella, 1 21 

 Pinus, 59 

 Placodium, 44 

 Plagiochila, 47 

 Plagiogramma, 22 

 Plantago, 139 

 Platanus, loi 

 Platygyrium, 54 

 Pleonectria, 50 

 Pleuridium, 49 

 Pleurococcus, 5 

 Pleurostigma, 24 

 Pleurotaenium, 2 

 Pleurotus, 41 

 Plowrightia, 30 

 Pluchea, 30 

 Plumaria, 16 

 Poa, 67 

 Pogonatum, 53 

 Pogonia, 80 

 Polanisia, lOO 

 Polyedrium, S 

 Polygala, ill 

 Polygonatum, 78 

 Polygonella, SS 

 Polygonmn, 87 

 Polyides, 16 

 Polypodium, 59 

 Polyporus, 38 

 Polysiphonia, 14 

 Polytrichum, 53 

 Pontederia, 75 

 Populus, 82 

 Porella, 48 

 Portulaca, 90 

 Porphyra, il 

 Potamogeton, 61 

 Potentilld, 103 

 Pottia, 51 

 Proserpinaca, 120 

 Protomyces, 28 

 Pruaella, 132 

 Prunus, 105 

 PsalHota, 41 

 Pseudomonas, 27 

 Psilocarya, 70 

 Ptelea, III 

 Pteris, 59 

 PtiliinniuTn, 122 

 Ptilota, 16 

 Puccinia, 35 



Punctaria, 9 

 Pylaisia, 55 

 Pyrola, 1 23 

 Pyxilla, 26 

 Pyxine, 44 



QUERCUS, 84 



pACOMITRIUM, 51 

 -•^ Radula, 48 

 Ramalina, 45 

 Ranunculus, 95 

 Raphanifs, 98 

 Raphidium, 5 

 Reseda, 100 

 Reticularia, I 

 Rhabdonema, 21 

 Rhabdonia, 13 

 Rhamnus, 114 

 Rhaphidostegium, 55 

 Rhexia, II9 

 Rhizoclonium, 7 

 Rhizopus, 28 

 Rhizosolenia, 20 

 Rhodobryum, 52 

 Rhododendron, 124 

 Rhodomela, 14 

 Rhodora, 124 

 Rhodymenia, 13 

 Rhoicosphenia, 25 

 Rhus, 113 

 Rhytisma, 29 

 Ribes, loi 

 Riccardia, 47 

 Riccia, 47 

 Ricinus, H2 

 Rivularia, 19 

 Robinia, 107 

 Roestelia, 35 

 Roripa, 98 

 Rosa, 103 

 Rotala, 118 

 Rubus, 102 

 Rudbeckia, 15 1 

 Rumex, 87 

 Ruppia, 62 

 RussulaJ 40 

 Ruta, III 

 Rynchospora, 71 



CABBATIA, 127 

 ^ Sacidium, 34 

 Saccharomyces, 28 

 Saccogyna, 48 

 Sagina, 92 

 Sagittaria, 62 

 Salicornia, 89 

 Salix, S$ 

 Salsola, 89 

 Sambucus, 140 



Samolus, 126 

 Sanguinaria, 97 

 Sanguisorba, 103 

 Sanicula, 121 

 Saponaiia, 9 1 

 Sarcina, 26 

 Sargassum, li 

 Sarracenia, 100 

 Sarothra, 116 

 Sassafras, 96 

 SaururuSj 8 1 

 Savastana, 64 

 Saxifraga, too 

 Scapania, 48 

 Scenedesmus, 5 

 Schizophyllum, 39 

 Scinaia, 12 

 Scirpus, 70 

 Scleranthus, 93 

 Scleria, 71 

 Scleroderma, 42 

 Scoliopleura, 24 

 Scropularia, 136 

 Scutellaria, 131 

 Sedum, 100 

 Selaginella, 59 

 Senecio, 154 

 Septonema, 32 

 Septoria, 34 

 Seriocarpus, 148 

 Sesuvium, 90 

 Sicyos, 142 

 Silene, 91 

 Silphium, 151 

 Sinapis, 97 

 Sisymbrium, 97 

 Sisyrinchium, 79 

 Sium, 122 

 Smilax, 78 

 Solanum, 135 

 Solidago, 146 

 Sonchus, 143 

 Sorbus, 104 

 Sparganium, 61 

 Spartina, 66 

 Spathyema, 74 

 Spergula, 93 

 Spermothamnion, 14 

 Sphacelaria, 9 

 Sphaerella, 4 

 Sphaeropsis, ^^ 

 Sphaerotbeca, 29 

 Sphaerozosma, 3 

 Sphaerozyga, 18 

 Sphagnum, 49 

 Spiraea, I02 

 Spirodela, 74 

 Spirogyra, 4 

 Spirotaenia, 2 

 Spirulina, 18 

 Sporidesmium, 32 



