INDEX 



Genotype, 536. 



Geotropism, 150, 151*. 



Geranium, bending toward light, 

 243*. 



Germination of seeds, 89-98; effect 

 of temperature on rate, 90; 

 moisture requirement, 91; neces- 

 sary conditions, 89; oxygen re- 

 quirement, 92; processes, 93-98; 

 temperature requirement, 89. 



Germinators, 99, 99*, 100*. 



Germ-plasm, 530. 



Gill Fungi, 385. 



Gleba, 390. 



Gleocapsa, 298. 



Gliadins, 282. 



Globulins, 282. 



Glomerella rufomaculans, 379, 379*. 



Glucose, 278. 



Glucosides, 285. 



Glumes, 17, 18*; empty or outer, 18, 

 18*; flowering, 18. 



Glutelins, 282. 



Glutenin, 282. 



Grafting, 225; described, 227, 232*. 



Gramineae, 495. 



Grape vine, 176, 176*. 



Grape Downy Mildew, 355, 355*, 

 356*, 357*. 



Grape sugar, 278. 



Grass, flowers, 17-23, 17*, 18*, 19*, 

 20*, 21*, 22*; family, 495; seed- 

 lings, 102, 102*, 103*, 104*. 



Grass type of seeds, 61-67. 



Green Algae, 301-318; confervoid, 

 310-314; conjugating, 314-316; 

 in relation to Lichens, 380; tubu- 

 lar, 316-318; unicellular motile, 

 302-307; unicellular non-motile, 

 307-310. 



Green Foxtail, seed, 76*. 



Green Molds, 364; described, 375, 

 375*. 



Grizzly Giant, 174*. 



Growth in roots, factors influencing 

 the direction, 150, 151*. 



Growth of Stems, 213-221; char- 

 acter and rate, 214; factors in- 



fluencing, 217-221; grand period, 



216; phases, 213; primary and 



secondary, 214; regions, 213, 



214*. 



Guard cells, 247, 246*, 247*. 

 Gulfweeds, 319; described, 323. 

 Gymnosperms, 67, 289; described, 



445-458; life cycle, 457*; seed 



and seedling, 67, 67*. 

 Gymnosporangium, 401, 400*, 401*, 



402*, 403*. 



.Halberd-shaped leaves, 479*. 



Hard seeds, 69. 



Hardwood cuttings, 227, 230*. 



Haustoria, 352, 356*. 



Head, 30, 29*, 32*. 



Heart Rot, White and Red, 389. 



Heart wood, 202, 200*. 



Heath family, 489. 



Heathers, 490. 



Heliotropism, 152. 



Helvellales, 364. 



Hemi-celluloses, 278. 



Hemlock, 451. 



Hepaticae, 405. 



Herbaceous stems, 171; structure, 

 192-197. 



Herbarium Mold, 375. 



Heredity, 533-557; and evironment, 

 535; in evolution, 569; Galton's 

 laws, 538; laws, 536; Mechanism, 

 534; Mendelian laws, 539; meth- 

 ods of investigating, 537; nature, 

 533. 



Heterocysts, 299, 299*. 



Heterogametes, 302. 



Heterogamous sexuality, 304. 



Heterospory, 442. 



Heterozygous, 545. 



Hibiscus Trionum, 487. 



Hickory, pistillate flower, 81*; species 

 and economic importance, 475; 

 tap-root, 139, 139*. 



Hilum, of seed, 57, 57*; of starch 

 grain, 256*, 



Histology, 2. 



Holdfasts, 135. 



