834 



Organised ferments, 347. 



— substance, 206, 312. 

 Organisms, plasticity of, 515. 

 Organograpiiy, i, 72. 3^8, 



424, 425, 429, 476, 478, 



5i2> 575, 702, 721, 722, 



745- 

 Originof carbon-compounds, 



325. 



— of fats, 323. 



— of proteids, 324, 325. 



— of roots, 477, 523. 



— of sexual cells, 787. 



— of starch in chlorophyll, 

 309. 



Ornithogallum umbellatum, 



641. 

 Orobanchacese,368, 372, 373, 



476, 765. 

 Orobanche, 14, 63, 399. 



— 443. 



— speciosa, 368. 



— Teucrii, 399. 

 Orthogonal trajectories, 447, 



457. 

 Orthotropic organs, 504, 547, 

 685, 698, 703-705, 709, 



7", 713, 740- 



— and plagiotropic organs 

 contrasted, 705. 



Orthotropism, 485, 489, 490, 

 492, 493, 494,500, 706, 

 707, 709. 



Orthotropous ovule, 760. 



Oscillarise, 107. 



Oscillations of temperature, 

 406. 



Oscillatorieae, 604, 606. 



Osmometer, 214, 275. 



— 276. 



Osmose, 211, 281. 

 Osmunda regalis, 51, 744. 



31, 524. 



Osteolite, 263. 



Ovary, 463, 651, 758, 759, 

 778. 



Ovule, 451, 463, 465, 751, 

 752, 754-756, 757-760, 

 766, 773, 778, 800. 



— conversion of growing- 

 point into, 465. 



Oxalate of lime, 177,291,320. 

 Oxalic acid, 328, 384. 



signilicance of, 325. 



Oxalideae, 199, 623, 626. 

 Oxalis, 183, 593, 598, 625, 



626, 631, 633, 642, 647, 



790. 

 Oxalis acetosella, 620, 627, 



649, 791. 



— 620. 



— carnea, 632, 633. 

 ■ — mhrantha, 791. 



— Ortgiesn, 316. 



INDEX. 



Oxalis rosea, 642. 



— sensitiva, 791. 



— •valdiviensis, 642. 

 Oxamide, 384. 

 Oxidation, 296, 381,400, 403. 

 Oxy-acids, 402. 



Oxygen, absorption of, 395, 

 398. 



— evolution of, 19s, 248, 

 264, 297, 303, 397. 



— and fermentation, 386. 



— importance for growth, 



397- 

 in nutrition, 287, 290, 



293, 382. 



— in plants, 202, 206, 296, 

 317, 324, 326. 



— necessity of 396, S95, 611. 

 respiration, 395. 



— rigor in, 595. 



— volumes absorbed in re- 

 spiration, 398. 



Pseonia, 323. 

 Paeony, 759, 760, 

 Palissade-cells, 321, 536. 

 Palm, 12, 37, 45, 46, 58, 130, 

 144, 156, 178, 200, 225, 



230, 334, 335, 353, 4i7, 

 461, 465, 470, 510, 702, 



798. 

 Palm, 46, 127. 

 Palmellaceae, 299, 324. 

 Pandorina Morum, 728-730. 



— 729. 



Papaver Rhceas, 175. 



— sominferum, 172, 399, 483. 

 Papaveraceae, 171, 173, 780. 

 Papayotin, 172. 

 Papilionaceae, 371, 496, 497, 



780, 791, 794- 



— leafless shoots of, 55. 

 Pappus, 125, 147. 

 Paraphyses, 726. 

 Parasites, 23,25,63, 203, 251, 



253, 292, 298, 366, 367, 



392, 534- 



— abnormalities induced by, 



368. 



— absorption by, 372. 



— action of, 368. 



— compared with seedlings, 



373- 



— food-materials of, 373. 



— internal, 370, 371. 



— embryo of, 765, 766. 



— nutrition of, 368, 369, 372. 



— respiration of, 399. 



— starch in, 372. 



— substance of, 372. 

 Parasitic fungi, 381, 388; 389, 



725. 



Parasitic phanerogams, 370, 



372. 476, 511, 534- 

 Parasitism, 25, 65, 367, 766. 



— oiCuscuta, 27. 



— degradation due to, 368, 



370. 



— of Dionssa, 376. 



— ■ of insectivorous plants, 

 377- 



— of mistletoe, 25. 



— of Pinguicula, 3 78. 



— oi Nepenthes, 379. 

 Parastichies, 497, 498, 500. 

 Paratonic effects, 628, 629, 



637-640. 

 Parenchyma, 141, 149, 169, 

 216, 232, 288, 325, 330, 

 355, 416, 423, 626, 630- 

 634, 645, 652, 655. 



— phloem, 138. 



— pressures and strains in, 



361, 569-572,581. 



— xylem, 138. 



Parental characters, blending 

 of in hybrids, 779, 782. 



Parietaria diffusa, 792. 



Paris quadrifolia, 60. 



495. 



Parthenogenesis, 767, 769. 



Partial growths, 544, 569, 

 685. 



Passiflora gracilis, 661, 666. 



— serratifolia, 400. 

 Passiflore3E,56, 658, 660, 661, 



780, 794. 

 Passion flower, 56. 

 Pastinacea sati-va, 425. 

 Patschouli, 185. 

 Pea, 56, 263, 314, 315, 334, 



3 37, 397, 398, 405, 660, 



759, 763. 



— 17. 



Pear, 146, 781. 

 Pectinaceous substances, 



328. 

 Pediastrum, 429, 484. 

 ■ — granulatum, 428. 

 Pedicularis, 760, 794. 

 Pelargonium, 185, 792. 

 Pellia, 608. 

 Peltate hairs, 124. 

 Peltigera canina, 707. 



— horizontalis, 34. 

 Penicillium glaucum, 75, 281, 



722,798. 

 Pentastemon, 780. 

 Peperomia, 582. 

 Pepsin, 378. 

 Peptones, 342, 343, 349, 377, 



384. 

 Peptonising ferments, 172, 



343, 345, 362, 376, 378, 



379, 389- 

 Perennial plants, 330, 



