524 



STUDIES IN SEEDS AND FRUITS 



Peas, 148, 176 (see also under Pisum 

 sativum). 



Pericarp, proportions by weight in 

 different fruits, 293-343, 478, 479, 

 483, 494-5 4- 



Permeable seeds : general treatment, 

 56-146 ; hygroscopicity, 70, 164- 

 167, 178, 184-186 ; behaviour in 

 time, 226, 231, 232, 235-237, 493 ; 

 Dr Cola's experiments, 107-111, 

 476 ; shrinking and swelling regime, 

 203, 210-214, 222, 22 3 > different 

 behaviour of permeable and im- 

 permeable seeds when dried after 

 swelling for germination, 31, 467 ; 

 excessive swelling, 43, 44, 46, 47, 

 54, 55 ; permeability, a quality by 

 default, 229, 240, 473. 



Pfeffer, 1,275, 3^3, 393,422. 



Phaseolus multiflorus (Scarlet-runner) : 



(a) Seed : permeability, 95 ; hygro- 



scopicity, 125, 164, 236, 493; 

 behaviour in time, 236, 493 ; 

 behaviour under high tempera- 

 tures, 142, 143, 235 ; water-per- 

 centage and absorptive capacity, 

 137, 142, 143, 154, 183; illus- 

 trating Berthelot's principle of 

 reversibility, 154, 183; shrink- 

 ing and swelling process, 26, 41, 

 201, 211, 321, 465; data for 

 determining the shrinking and 

 swelling regime, 201 ; pre-rest- 

 ing seeds not in a saturated 

 state, 33 ; proportions of coats 

 and kernel, 189, 201 ; seed- 

 coloration, 369, 379-382, 386, 



390, 395- 



(b) Fruit : drying process, 262, 269, 



321, 326 ; proportions of peri- 

 carp and seeds, 298, 303, 316, 

 326, 329. 



Phaseolus sp. sp., 27, 189, 326. 

 vulgaris, seeds : permeability, 95 ; 

 swelling process, 26, 27, 465 ; pro- 

 portion of coats and kernel, 189, 

 470 ; drying of seed swollen for 

 germination, 30, 468, 470 ; color- 

 ation, 395. 



Pinus, 27, 195-197, 394. 

 Pisum sativum : 



(a) Seeds : permeability, 95, 473 ; 

 hygroscopicity, 125, 148, 164, 

 174-176 ; water-contents and 

 absorptive capacity, 137, 142, 

 J 43, 2 35 ; behaviour under high 

 temperatures, 142, 143, 235 ; 



Pisum sativum continued. 



behaviour of seeds in time, 236, 

 493 ; shrinking and swelling 

 process, 26, 27, 201, 211, 465, 

 466, 468, 484 ; data for deter- 

 mining the shrinking and swell- 

 ing regime, 201 ; drying of 

 seeds swollen for germination, 

 468, 469 ; proportions of coats 

 and kernel in the three con- 

 ditions of the seed, 189, 201, 215, 

 216; the water required for 

 germination and for saturation, 

 43, 44, 471 ; coloration of seed 

 and embryo, 386, 390, 394. 

 (b} Smooth and wrinkled seeds differ- 

 entiated, 137, 164, 189, 201, 211, 

 386, 390, 465, 466. 

 (c) Fruit : drying process, 262, 326, 

 483-485 ; the difference between 

 drying on and off the plant, 483- 

 485 ; proportions of pericarp 

 and seeds, 298, 300, 301, 326, 

 331 ; hygroscopicity, 174, 175. 



Pithecolobium filicifolium, 4, 26, 95, 422. 



Plantago, 409. 



Poinciana regia : 



(a) Seed : degree of permeability, 94, 



96 ; hygroscopicity, 165 ; water- 

 contents and absorptive capacity, 

 123, 137 ; shrinking and swelling 

 process, 22, 26, 36, 40, 201, 211, 



218, 219, 321 ; shrinking and 

 swelling regime and the re- 

 quisite data, 201, 218, 219 ; the 

 ushering in of the rest-period, 

 391, 392, 401, 425, 438; drying 

 of seeds swollen for germination, 

 30, 32, 467, 468, 470 ; coloration, 

 386, 390 ; proportions of coats, 

 kernel, and embryo, 189, 201, 



219, 409. 



(b) Embryo ; shrinking and swelling 



regime, 218, 219; dried after 

 swelling for germination, 32, 

 470 ; weight, 409 ; colour, 390- 

 394, 401 ; changes on entering 

 and passing out of the resting 

 state, 391-393, 4oi, 425, 438; 

 its stage of development, 451. 



(c) Fruit : drying process, 262, 321, 



325, 500; proportions of pericarp 

 and seeds, 297, 300, 325 ; effect 

 of failure of ovules and seeds on 

 the form of the pod, 360, 366; 

 hygroscopicity, 174, 175. 

 Poplar, 418. 



