594 



INDEX 



161 ; primary, 119 ; of ruots, 161 

 secondary, 119; of stems, 160. 



Growth Forms, 559. 



Guard cells, 33, 49, 50, 262; opera- 

 tion of, 49. 



Gum, 104. 



Gum tree, 113, 551. 



Guttation, 52. 



Gymnosperm, 352. 



Gymnospermce, described, 516. 



Gymnosporangium, 469. 



Habitats, 559. 



Habit Forms, 559. 



Hair-like structures, 351. 



Hairs, 70. 



Half parasite, 87, 577. 



Halophytes, 573. 



Haustorium, 83, 256. 



Head, 336, 337. 



Healing of injuries, 122, 123, 206. 



Health in plants, 369. 



Heart wood, 124, 145. 



Heat of respiration, 168. 



Heath, Formations, 586 ; Shrubs, 



574. 

 Heather Shrubs, 574. 

 Heaths, 553. 

 Heliotropism, 54. 

 Helobioe, 530. 

 Helophytes, 571. 

 Helotism, 462. 

 Hemi-cellulose, 103. 

 Hemlock, 552. 

 Hepaticce, described, 479. 

 Heracleum, 553. 

 Herb, 9. 



Herbaceous Perennials, 568. 

 Herbarium, 3. 

 Heredity, 10, 13, 39, 128, 285, 308; 



defined, 308, 314 ; diagram, 310. 

 Hermaphrodite, 526. 

 Heterocontce, 422. 

 Heterocysts, 400. 

 Heteroecious Parasites, 578. 

 Heterogametes, 397. 

 Heterogamous, 415. 

 Heterospory, 493. 

 Heterozygous, 310. 

 Hilum, 376. 

 Histology, 3. 

 Holdfasts, of Algae, 440. 

 Hollow column, 180. 

 Homospory, 493. 



Homozygous, 310. 



Honesty, 348. 



Hooks, 361. 



Horse Chestnut, twig, 120, 550. 



Horsetails, 500, 501. 



Horticulture, 4. 



Host, 83. 



Hotbeds, 258. 



Houseleek, 142. 



House plants, 48, 241. 



Humid-Dry Habitats, 567. 



Humus, described, 241, 243. 



Hurrahs' Nests, 469. 



Hybrid, 320. 



Hybridization, 318; method, 320. 



Hydnum,,474:; repandum, 472. 



Hydrangea, 339. 



Hydrodictyon, 418, 434, 563. 



Hydrophyte, 190, 501. 



Hydrophytic Parasites, 578. 



Hydropteridales, described, 499. 



Hydrotropism, 177; described, 247. 



Hygroscopic phenomena, 237 ; tis 



sues, 366. 

 Hymenium, 450, 464. 

 Hymenomycetes, described, 470. 

 Hymenophyllaeeai, 498. 

 Hypocotyl, 355, 374. 

 Hysterophytes, 398, 561, 574, 577. 



Iceland Moss, 463. 

 Idioblasts, 33. 

 Imbibition, 148, 237. 

 Imbricate, 329. 

 Immunity, 370, 407. 

 Improvement of plants, 2. 

 Indian Pipe, 83, 85, 554. 

 Indusium, 495. 

 Infantile paralysis, 407. 

 Infusoria, 411. 

 Infusorial earth, 428. 

 Inhibitory influence, 202. 

 Initial cell, 355. 

 Injuries, healing, 122. 

 Inorganic Habitats, 560. 

 Insectivorous Plants, 87, 578. 

 Insect-pollinated flowers, 290. 

 Insects as cross-pollinators, 290. 

 Integuments, 274. 

 Intercellular air system, 33, 266. 

 Internode, 116. 

 Interpolants, 581. 

 Intertidal Rockweeds, 564. 

 Involucre, 339. 



