Mougeotia. 47. 
Muhlenbergia, 49. 
Musenium, 41. 
Naias, 22. 
Nasturtium, 31, 50 
Navicula, 46. 
Nectriella, 12 
Nelumbo, 5. 
Nitella, 20. 
Nitzschia, 47. 
Nostoc, 45. 
Nothoscordium, 4. 
Gdogonium, 10, 47 
Cnothera, 33. 
Opegrapha, 12. 
Opuntia, 33. 
Oreocarya, 37, 52. 
Oscillaria, 45. 
Osmorrhiza, 51. 
Oxytropis, 51. 
Panicum, 25, 50. 
Parmelia, 13. 
Pastinaca, 33. 
Pectis, 42. 
Pediastrum, 9. 
Pedicularis, 38. 
Peltigera, 13. 
Pentstemon, 5, 38, 53. 
Peronospora, 11 
Perichzena, 45. 
Petalostemon, 34 
Peucedanum, 41 
Peziza, 14. 
Phacelia, 37. 
Phialea, 48. 
Phlox, 52, 
Pholiota, 19. 
Phragmidium, 4, 14. 
Phyllachora, 12. 
Phyllosticta, 15. 
Physalis, 5, 38, 52. 
Physalospora, 11 
Physaria, 30. 
Physarum, 8. 
Physcia, 13. + 
Physostegia, 39. 
Pithophora. 9. 
Placodium, 13. 
Plantago, 40. 
Plasmopara, 11 
Pleurosigma, 47 
Pleurotus, 19. 
Plowrightia, 12. 
Pluteus, 19. 
Poa, 25, 49. 
Podosporium, 4. 
Polygala, 51. 
Polygonatum, 26. 
Polygonum. 27, 50. 
Polyporus, 19. 
Polystictus, 49. 
Polytrichum, 21. 
Potamogeton, ‘2 
Potentilla, 34. 
Protococcus, 46. 
Psoralea, 35. 
Pterula, 20. 
Puccinia, 14, 48 
Pyrola, 36. 
Quercus, 4+ 
Ramularia, 4, 17 
Ranunculus, 30 
Raphidium, 46. 
Reticularia, 8. 
Rhabdospora, 16. 
Ribes, 33, 51. 
Rosa, 51. 
Rumex, 27. 
Ruppia, 22. 
Saccharomyces, 15. 
Sagittaria, 22. 
Salix, 27. 
Salvia, 39. 
Saponaria, 30. 
Sclerospora, 11. 
Sclerotinia, 47. 
Scutellaria, 39 
Septoria, 16. 
Seymeria, 53. 
Silene, 30. 
Sisyrinchium, 50 
Smilax, 26. 
Solidago, 43. 
Sorastruin, 9. 
Sorosporium, 4X. 
Spherella, 12 
Sphzrozosma, 9. 
Spiranthes, 226. 
Spirogyra, 47. 
Spirotznia, 9. 
Sporobolus, 49 
Stachybotrys, 17. 
Stachys, 39. 
Stanleya, 50. 
Staurastrum, 10, 46. 
Stauroneis, 46. 
Stegonospora, 4. 
Stellaria, 29. 
Stemonitis, 8, 45. 
Stephanomeria, 41 
Stereum, 19, 49. 
Stigeoclonium, 9. 
Suzda, 28. 
Synedra, 47. 
Tetraspora, 9. 46 
Thelesperma, 42. 
Thelypodium, 30. 
Townsendia, 43. 
Trichia, 45, 
Tricholoma, 18. 
Trifolium, 35. 
Trillium, 50. 
Typha, 23. 
Urceolaria, 13. 
Uredo, 15. 
Urocystis, 15. 
Uromyces, 14, 
Ustilago, 15. 
Verbena, 40. 
Vermicularia, 16. 
Vernonia, 44. 
Verpa, 48. 
Verticillium, 48. 
Woodsia, 4. 
Xanthidium, 10. 
Xylaria, 47. 
Zygnema, 47 
Zygadenus, 50. 
