INDEX 



263 



Pinus Banksiana, 221 



Laricio, 126 



Strobus, S3 

 Pisum sativum, 61 

 Plantago major, 95 

 Plantain, 95 



Plant groups, sequence of, 130 

 Plants, evolution of, 124, 201 

 Pleurococcus, 80, 127 



vulgaris, 46, 47 

 Plover, American golden, 151 



Pacific golden, iji 

 Phichea faetida, 164 

 Polydemics, 177 

 Polyphyletic hypothesis, 239 

 Polypodiacem, 139, 169 

 Polypodium, 7, 8, 9, 12 



punctatum, 6 



venosum, 128 

 Polysiphonia, 135 

 Porrella, 128 

 Poientilla niua, 161 

 Primofilices, 236 

 Prince's Island, 148 

 Priichardia, 165 

 Proangiosperms, 216 

 Pro-anthostrobilus, 232 

 Problem, the modern, 100 

 Propagation, 32 



vegetative, 49, 5° 

 Prothallus, 18, 19 

 Protonema, 17, 18 

 Protoxylem, 245 

 Frunus Gravesii, 180 



maritima, 180 

 Pteridophs^ta, 245 

 Pteridophytes, 244 

 Pteridosperms, 2or 



significance of the, 206 

 Pteris, 9 



aquiUna, 2, 8, 154 



longifolia, 6 



Pteropsida, 238 



Puccinia glumarum, 71 



Pure line breeding, 68 



Purity of gametes, theory of, 63, 64 



Quercus chrysolepis, 103 

 Qu6telet, 105 

 Qu6telet's curve, 106, 107 

 Qu^telet's law, 105 



Race, middle, 223 

 Radium, 73, 242 

 Randies, 218 

 Ranunculus aqualilis, 86, 87 



Ficaria, 226 

 Receptacle, 8 

 Reduction, 35 



nature and method of, 36 

 Relict endemic, 167 

 Relicts, 177 

 Reproduction, inheritance and, 50 



sexual, 32, S3 

 Rhizoid, 18, 17, 23 

 Rhizomes, 3 

 Rhizophora Mangle, 228 

 Rhizopus, SI 

 Rhododendron lapponicum, 159 



zerlicillatum, 147 

 Riccia, 126, 129, 173 



trichocarpa, 128 

 Rock strata, classification of, i8g 

 Rocks, stratification of, 188 

 Root-stocks, 3 

 Rubiacea, 171, 172 

 Rubus chamaemorus, 155 

 Rudbeckia sp., 114 

 Rust disease, 71 



Salina, 199 



Saltation, orthogenetic, 109 



Salvinia, 82 



Sap, nuclear, 36 



