358 



PLANT-BREEDING 



Petkus, Rye of, 46. 



Petunia, Hybrid between tobacco 



and, 219. 

 Pierce's grape, 232. 

 Pisum arvense and sativum, 255. 

 Pitchers, 292. 

 Plots, Breeding, 137. 

 Plum, 21S fig.: and apricot hy- 

 brids, 218; and cherry hybrids, 

 218; Bartlett, 226; Burbank, 

 170: Hybrid, 210; Satsuma, 170; 

 Sorts of, 211 ff.; Wickson, 175. 

 Plumcots, 218. 

 Pollen of corn, 122. 

 Pollination, 220; of corn, 122; of 

 corn by hand, 126, 129 fig. ; of 

 evening primroses, 252 f. ; of 

 sweet corn. Cross-, 123 fig. 

 Poppy, Blue, 234; Californian, 

 209; Common, 209; Danebrog 

 opium, 319 fig.; Hybrid, 232, 

 233 fig.; Leaves of hybrid, 231 

 fig.; Opium, 209; Pistillodous 

 opium-, 297; Polycephalous opi- 

 um, 299 fig. ; Scarlet California, 

 234; Seedling-plants of, 295 fig.; 

 Seeds of opium, 244; Young 

 opium, 301 fig. 

 Potatoes, Correlations in, 258; 



Methodical study of, 284. 

 Prentice barley, 65. 

 Primrose, Evening, 170, 250; Flow- 

 ers of Evening-, 252 fig. ; Fruits 

 of Evening-, 305 fig. ; Hybrid of, 

 318; Lamarck's evening-, 17 ff., 

 327 fig. ;Mutations of evening-, 

 322; Rosette of Lamarck's even- 

 ing-. 330 fig-; Seedling-plants of 

 Evening-, 295 fig.; Short-styled 

 evening-, 325 fig; Smooth-leaved 

 variety of the evening-, 331 fig. 

 Primus-barley, 240, 269; berry, 



186. 

 Princess barley, 65. 

 Pringle's wheat, 36. 

 Progeny, Mixed, 72 ; of corn. Com- 

 parative trial of, 137; Uniform, 

 72. 

 Protein, Selection for, 154. 

 Prune, Burbank giant, 179 fig.; 

 Burbank sugar, 181 fig.; Cali- 



fornia sugar, 172; Stoneless, 

 189, 190 fig., 226. 

 Piunus Americana X nigra, 213; 

 Mahaleb, 223; maritima, 212; 

 Pissardi, 213, 215 fig.; Simoni, 

 213, 226; triflora, 176, 213. 



Ouetelet's law of variability, 5. 

 Quince, Japanese, 183; Selection 

 of, 239. 



Races, Pure, 77: Self-dependent, 

 95 ; Types of, 94. 



Raspberry, Cuthbert, 187; Sibe- 

 rian, 186. 



Records, Value of scientific, 71. 



Rhodanthe, 170. 



Rhubarb, Crimson, 172. 



Ribes, aureum, 315 fig.; Gordon- 

 ianum, 314 fig., 316; sanguin- 

 eum, 184, 247, 315 fig., 316; 

 sanguineum glutinosum, 185; 

 sanguineum X aureum, 316. 



Richardia africana, 204. 



Riley, James, breeder of corn, 131. 



Rimpau, breeder of cereals, 46. 



Rimpau's rye of Schlanstedt, 95, 

 97 fig. 



Rubus Californicus, 186; fruti- 

 cosus laciniatus, 249 fig.; Sibi- 

 ricus, 186. 



Rye of Petkus, 46; of Schlan- 

 stedt, 46, 95, 97 fig. 



Satsuma plum, 170, 211. 



Schindler, Work of, 294. 



Schizanthus, 170. 



Schlanstedt, Rimpau's rye of, 95, 

 97 fig. ; Rye of, 46. 



Schribaux on Schlanstedt rye, 96. 



Scott on constancy of species, 8. 



Scrophularia nodosa. Seedling 

 plants of, 295 fig. 



Seed-grain society for Sweden, 54. 



Seedlings, 295 fig. ; Chance, 222; 

 Hybrid cactus, 191 fig.; Seeds 

 and color-varieties, 244; Size 

 and germination of, 261; Size 

 and integuments of, 259. 



Selection, and amelioration, Ger- 

 man method of, 56; Causes of 

 improvement in repeated, 66; 



