INDEX. 



817 



Growth, respiration during, 

 399- 



— slowest at apex, 449, 457, 



544- 



— in thickness, 483, 574, 

 577. 



— and tissue-tensions, 569- 

 574. 



— types of, 451. 



— velocity of, 552, 560, 569, 

 571. 



— zones of, 544. 



— of Algse, 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 internodes, 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. 

 Guiactttn, 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. 



— cnlomelanos, 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, 28^, 287. 



H. 



Habitats of Lichens, 392. 

 Hx77iatococcus, 612, 613. 



— lacKstris, 611. 



— plui'ialis, 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. 

 Hedysariim gyrans, 593, 596, 



598, 627, 637. 



627. 



Heleocharis, 708. 

 Helianthemum, 595. 



— t'ulgare, 396. 

 Heliatjthus, 186, 574. 



— annuiis, 199, 236, 271, 

 273, 313, 468, 498, 640. 



42, 95, 112, 277, 



461, 467. 



— tuber osus, 59, 319, 335. 



79, 336. 



Heliotropic curvatures, 693, 



694. 



— eflfects 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, 15, 37, 229, 262, 



289, 345, 660, 757, 798. 

 Hepaticse, 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. 

 Hevia, 172. 

 Hibbertia dent at a, 669. 

 Hibiscus, 782. 

 Hieraceum piliferum, 121. 

 Hilum, 338. 

 Hippuris, 44. 



— 469. 



■ — vulgaris, 40, 424. 



Histogenic layers, 420. 



Histological diff"erentiation, 

 416, 570, 571- 



Histology of wood, 160. 



Hoar-frost, 404. 



Homoiomerous Lichens, 39 2 . 



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. 

 Hoya carnosa, 177. 



89. 



Humus, 259. 



