INDEX. 



817 



Growth, respiration during, 



399- 



— slowest at apex, 449, 457, 



544- 



— in thickness, 483, s74j 

 577. 



— and tissue-tensions, 569- 



574- 



— types of, 451. 



— velocity of, 552, 560,569, 



571- 



— zones of, 544. 



— of Algae, 425, 429. 



— of cambium, 157. 



— of cells, 96, 422, 432, 437, 



563, 565. 

 ■ — of cortex, 158. 



— of crystals, plants and 

 animals compared, 412, 



413- 



— of epidermis, 166.. 



— of filamentous organs, 



443, 453- 



— of flat structures, 441, 



445- 



— of Fungi, 425, 426. 



— of intemodes, 540-545, 



553- 



— of leaves, 422, 540, 640. 



— of non-cellular plants, 

 540, 543- 



— of orthotropic organs, 

 698, 709, 711. 



— of plagiotropic organs, 

 698, 711. 



— of roots, 17, 539, 541-544. 



553- 



— of shoot, 41, 421, 422, 



540-544. 



— of starch grains, 315. 



— of tendrils, 664, 665. 



■ — of twining shoot - axes, 

 669, 674. 



— of young organs, 364, 

 419. 



Guard-cells of Stomata, 97, 



248. 

 Guiacum, 163, 



— officinale, 177. 



Gum, 90, 124, 172, 175, 180, 

 328, 566. 



— arable, 90, 328. 

 passages, 181. 



— tragacanth, 328. 



— vesicles, 179. 

 Gummosis, 180. 

 Gummy substances, 182. 

 Gymnogramme, 186. 



— calome/anoj, 126. 



— chrysophylla, 780. 



— distans, 780. 

 Gymnosperms, 155, 178, 745, 



746, 750, 751, 754-757, 

 758, 764, 772, 788. 



[3] 



Gymnosperms, 754. 



— and angiosperms com- 

 pared, 757-764- 



— embryology of, 751, 754, 



755. 



— fertilisation in, 755. 



— flowers of, 756. 

 Gynostemium, 796. 

 Gypsum, 252, 262, 284, 287. 



H. 



Habitats of Lichens, 392. 

 Hsematococcui, 612, 613. 



— lacustris, 611, 



— pluvialii, 609. 



Hairs, 122, 126, 289, 376, 

 423,435,482. 



— root-, 17-20, 25, 12 3 

 Halymeda, 154, 179. 



— opuntia, 153. 

 Haschish, 185. 



Haulms of Grasses, 687, 688. 

 Haustoria, 25, 63, 369, 372, 



373, 388, 390, 725. 

 Hazel, 266, 584, 763. 

 Heart-wood, 163, 230, 268, 



344- 

 Heat, animal, 404. 



— as a stimulus to proto- 

 plasm, 617. 



— of combustion, 199. 



— of imbibition, 210. 



— influence on plant-life, 



190, 191. 



— loss of, by radiation, &c., 

 404. 



— of respiration, 403, 405. 



— rigor due to, 593. 



— spontaneous, 395, 405. 

 Hedera Helix, 523. 

 Hedysarum gyrans, 593, 596, 



598, 627, 637. 



627. 



iJeleocharts, 708. 

 Helianthemum, 595. 



— "vulgare, 396. 

 HetiantAus, 186, 574. 



• — annuus, 199, 236, 271, 

 273, 31 3> 468, 498, 640. 



42, 95, 112, 277, 



461, 467. 



— tuber osus, 59, 319, 335. 



79, 336. 



Heliotropic curvatures, 693, 



694. 



— effects of coloured lights, 

 696, 697. 



Heliotropism, 16, 199, 485, 

 512, 528, 546, 589, 596, 

 600, 602, 612, 616, 617, 

 621, 622, 627, 628, 677, 

 692-697, 699, 702, 705, 

 707,709, 710, 712. 



3 G 



Heliotropism, antagonism to 

 geotropism, 694, 708,713. 



— elimination of, 705. 



— experiments on, 693, 694. 



— and geotropism com- 

 pared, 692, 694, 695, 696. 



— positive and negative, 

 693-697, 701, 703, 709, 

 711, 712, 713, 714. 



— of tendrils, 667. 



— theory of, 677, 695, 696, 

 697. 



Helleborus niger, 279. 

 Hemp, II, 13, 37, 229, 262, 



289, 345, 660, 757, 798. 

 Hepaticae, 31. 



— apical-cell of, 452. 

 Heracleum, 216. 

 Herb Paris, 60. 

 Heredity, 9, 503, 516, 723, 



779- 

 Herkogamy, 789, 799. 

 Hermaphrodite flowers, 757, 



788. 

 Herposiphonia repens, 483. 

 Heteromerous Lichens, 392. 

 Heterosporous Vascular 



Cryptogams, 745-751- 

 Heterostylism, 789, 790, 799. 

 Heterostylous flowers, 792. 

 He-via, 172. 

 Hibbertia dentata, 669. 

 Hibiscus, 782. 

 Hieraceum piliferum, 121. 

 Hilum, 338. 

 Hippuris, 44. 



— 469. 



— -vulgaris, 40, 424. 

 Histogenic layers, 420. 

 Histological differentiation, 



416, 570, 571. 



Histology of wood, 160.. 



Hoar-frost, 404. 



HomoiomerousLichens,392. 



Homologies between Pha- 

 nerogams and Crypto- 

 gams, 751, 756. 



Honeysuckle, 668. 



Hooks, 657. 



Hop, 24, 56, 124, 185, 242, 

 289, 548, 551, 552, 657, 

 660, 668-672, 676, 757. 



— 184. 

 Horse-chestnut, 43,123, 186, 



283, 285, 314, 319, 351, 

 506, 507, 531, 578. 



— 359. 



radish, 802. 



tails, 55, 59, 62, 418, 701, 



739-742, 745. 

 Host-plants, 368, 369. 

 Hqya carnosa, 177. 



89. 



Humus, 259. 



