372 



ESSENTIALS OF BOTANY 



Germination, conditions of, 7-9. 



Gill fungi, 269-262*. 



Gills, *260, *261. 



Gipsy moth, 350, 361. 



Gourd-fruit, 188. 



Grafting, *75. 



Grain, 186, 324, 326. 



Grape hybrids, 319. 



Grape sugar, 85. 



Grapes, 330. 



Gray, Asa, 65. 



Green algee, 225-230*. 



Green layer of bark, 69. 



Growing point, 6, *36. 



Growth, secondary, 71, *72,*73, 74. 



Guard-cells, *128, *129, 132. 



Gymnosperms, 163, 211. 



Hairs, 132. 



Hairs, stinging, 124, 125, *126, 



Halberd-shaped, App. I, *356. 



Halophytes, 114, 118. 



Hard bast, *68, *69, *70, *73. 



Hard woods, 344-348*. 



Haustoria, 32, *33. 



Hay, 336. 



Head, App. I, *358. 



Heart-shaped, App. I, *356. 



Heartwood, 74, 77. 



Heliotropism, 111, 112. 



Herbs, 64. 



Hesperidium, 181, 182, *188. 



Heterospory, 293. 



Hilum, *5. 



Honey-bee, leg of, *170. 



Hop, twining of, *57. 



Horse-chestnut bud, study of, 80, 



87. 

 Horse-chestnut twig, 49, 60. 

 Horsetails, 287-291*. 



Host, 32, *33. 



Hot springs, plants in, 204. 



Hyacinth, bulb of, *60. 



Hybrid, 316. 



Hybridization, 316. 



Hybridizing, 316-323. 



Hydrangea, transjjiration in, *133, 



134. 

 Hydrogen, 138. 

 Hydrophytes, 114, *11.5. 

 Hymenium, *261, *262. 

 Hyphaj, *247, *249, *251, *255. 

 Hypocotyl, »5, *23, *71. 

 Hypocotyl, cross-section of, *71. 

 Hypogynous, 155, *156. 



Imperfect flowers, *149. 

 Indefinite annual growth, 54. 

 Indehiscent fruits, 185, *186. 

 Indeterminate inflorescence, App. 



I, 361. 

 Indian corn, germination of, 6, 7. 

 Indian corn, hybridizing, 317. 

 Indian corn, kernel of, *14. 

 Indian corn, root-tip, *36. 

 Indian corn, structure of stem, *05, 



66. 

 Indian pipe, 139, 

 Indusium, *281. 



Inflorescence, App. I, 358-361*. 

 Inflorescence, diagrams of, App. I, 



*360. 

 Insect pollination, 169-180*. 

 Insect pollination, study of, 180. 

 Insect visits, *172, *173. 

 Insect-traps, leaves as, 119-122*. 

 Insectivorous plants, 119-122*. 

 Insects, pollen-carrying apparatus 



of, 169, *170. 

 Insects, sense of smell of, 170, 171. 



