INDEX TO PLANT NAMES. 157 



Pilocereus 109 



Pine-apple '^■7 



Pine 38, 39, 54, 70, 103, 109, 138, 139 



Pinon 39 



Pinus 38, 39, 136, 139 



Plant, Century 109 



Sensitive 14 



Plum 57,71,74,81,83,89, 106 



Pomaceae 131 



Poplar 58 



Potato 24, 85, 88, 92 



Privet 132 



Prunus 81, 131, 146, 148 



Pseudolarix 140 



Pseudotsug-a 38, 138 



Ptelea • • 132 



Pyrus 79 



Quince 106 



Quinoa 92 



Radish 6 



Raphanus 16 



Raspberry 71,74,81,83,89, 116 



Rhododendron I49, 152 



Rhubarb 89 



Rhus 132 



Ribes 130 



Roripa I7 



Rose 77 



Rubus 89 



Rutacese •. 132 



Rye 90 



Sambucus I33 



Sandcherry 81 



Sassafras 146, I47, 150 



Sciadopitys 140 



Solanum tuberosum 23, 24, 85 



Sphaeralcea 51 



