INDEX 



93 



Prairie Clover, 42. 

 PricJily Pear, 51, 

 Primrose, 53, 54, 59. 

 Primrose Family, 59. 

 Primula, 59. 

 Primulacese, 59. 

 Prunella, 71. 

 Pniuus, 40. 

 Pseudotsuga, 6. 

 Puccoon, 68. 

 Pulsatilla, 25. 

 Pulse Family, 40. 

 Purslane, 20. 

 Purslane Family, 20. 

 Pyrola. 58. 

 Pyrolaeeae, 57. 

 Pyrola Family, 57. 



Quercus, 16. 



Ranunculacese, 23. 



Ranunculus, 25. 



Ribes, 34. 



Rgcky Mountain Bee-plant, 31. 



Roripa, 29. 



Rosa, 39. 



Rosaceae, 35. 



Rose, 39. 



Rose Family, 35. 



Rubus, 36. 



Rudbeckia, 86. 



Rumex, 19. 



Sa^ttaria, 8. 

 Salicaceae, 14. 

 Salix, 14. 

 Saltwort, 60. 

 Sambucus, 79. 

 Sandalwood Family, 17. 

 Sand Flower. 20. 

 Sandwort, 22. 

 Santalacese, 17. 

 Saxifraga, 32. 

 Saxifragaceae, 32. 

 Saxifrage, 32. 

 Saxifrage Family, 32. 

 Sorophularia, 76. 

 ScrophulariaceEB, 73. 

 Scutellaria, 71. 

 Seaside Crowfoot, 26. 

 Sedimi, 32. 



Self-heal, 71. 

 Senecio, 88. 

 Service Berry, 39. 

 Shepherd's Purse, 30. 

 Shooting Star. 60. 

 Shrubby Cinquefoil, 3( 

 Sieversia, 38. 

 Silene, 22. 

 Silver Weed, 37. 

 Sisymbrium, 29. 

 Skullcap, 71. 

 Smartweed, 19. 

 Snowball, 20. 

 Snowberry, 80. 

 Solanaceas, 71. 

 Solanum, 72. 

 Sorrel Family, 47. 

 Spanish Bayonet, 11. 

 Spargauiaceae, 7. 

 Sparganium, 7. 

 Specularia, 81. 

 Speedwell, 74. 

 Spiderwort, 8. 

 Spiderwort Family, 8. 

 Spiny Poppy, 27. 

 Spring Beauty, 21. 

 Spruce, 6. 

 Spurge, 46. 

 Spurge Family, 46. 

 Stachys, 71. 

 Stanleya, 28. 

 Steironema, 60. 

 Stenotus, 87. 

 Stickseed, 66. 

 Strawberry, 37. 

 Streptopus, 12. 

 Sulphur Flower, 18. 

 Sunflower, 86. 

 Sweet Cicely, 56. 

 Sweet Clover, 42. 

 Symphoriearpos, 80. 

 Synthyris, 74. 



Taraxacum, 82. 

 Tellima, 33. 

 Tetraneuris, 87. 

 Thlaspi, 29. 

 Thermopsis, 41. 

 Thorn, 39. 

 Thorn-apple, 73. 

 Towusendia, 84. 

 Tradescantia, 8. 



