INDEX 



803 



Gourd, 717 



Grafting, 292, 3.^9, 417-420; types ol. 

 293, 418 



Grain, 365; bird's-eye, 712: wood, 289 



Gramineae, 693 



Grass family, 693; flower, 357, 696; leal. 

 19, 76 



Grasses, beach, 91; bent, 43; Bermuda, 

 44; blue grama, 695, 767; bluegrass, 

 40. 43, 91; buffalo, 695, 767; eulalia. 

 694; fescue, 43; giant reed, 694; lawn 

 and ]5asture. 42-46; needle, 766; orna- 

 mental, 694; poverty, 45; slender 

 wheat, 766, wheat, 766; winter fat. 

 769 



Grasslands, 741, 763 



Grazing, 793 



Green plants, 101, 1«(), (i90: \s. noii- 

 green, 512 



Greenland center, 734 



Groundnut, 408 



Growth, 36. 43, 161; and carbon mon- 

 oxide, 416; and cell enlargement, 211: 

 and hormones, 55, 81, 215; and in- 

 organic salts, 325, 327; and light, 53- 

 56, 215; and mineral deficiencies, 328: 

 and moisture {see Water): and nitro- 

 gen, 190; and rigidity, 210; and tem- 

 perature, 189; curvatures. 209, 215; in 

 leaves, 76; of lemon Irints. 231: pres- 

 sure, 212; root-shoot, 192; substances, 

 55, 81, 416 



Guard cells, 74. 78 



Gulfs, 598 



Gums, 169, 172 



Guttation, 321, 322 



Gymnosperms, 368, 682-687 



Gyrnnostomuin . 644 



Hairs, epidermal, 87, 224 

 Hammocks, 758 

 Haploid, 451 

 Haustoria, 298. 506, 551 

 Hay fever, 385 

 Head. 258, 360. 361 

 Heartwood. 263 

 Heath family. 713; plant, 714 

 Hedivigia, 641 

 Hemicellulase, 175 

 Hemicelluloses. 169. 170, 175 

 Hemlock, 750; ^vestern. 784 



Hepaticae, 645 



Hereditary differences in leaves, 84-94: 



factors, 455; potentialities, 443 

 Heredity, 29, 56, 84, 97, 147, 438-457 

 Heterospory, 668, 676 

 Heterozygosity, 467 

 Hibiscus, 435 

 Holdfasts, 258 



Hollow log, 263; plants, 263 

 Homospory, 668, 676 

 Homozygosity, 467 

 Hormones, 55. 81, 169, 175, 193, 212, 



213, 305, 335 

 Horse chestnut, stems and buds of, 246 

 Host, 507, 572 

 Human cosmos, 182 

 Human foods. 106 

 Hiunmocks, 211 

 Hybrid, 432, 481, 482; segregation, 432. 



458-473 

 Hybridization, 459, 572 

 Hydrogen, 96, 177 

 Hydrolysis, 99, 130, 139 

 Hydroponics, 331 

 Hypha, 541 



Hypocotyl, 10, 11, 294, 296. 367 

 Hypodermis, 280, 292 



Imbibition, 199, 201 



Immunity, 524 



Inbreeding, 432, 468 



Indian pipe, 30, 504. 509 



Indians and agriculture, 423. 427; and 



industries, 429, 430 

 Indusium, 664 

 Infection, 524, 572 

 Inflorescences, 360 

 Inheritance, 438; chromosomal, 445; 



plastid, 444 

 Inorganic salts, 325, 594 

 Insectivorous leaves, 91 

 Internode, 10, 246, 247 

 Interpretations of plant behavior, 50- 



58, 192 

 Interrelations of plant parts, 188-194 

 Inulase, 175 

 Inulin, 103, 134, 175 

 Invertase, 124 

 Iodine test, 103, 132 

 Ions, 61, 95 

 Iris, 85 



