730 



INDEX. 



Gnetales, 316 



Gonidia, 118, 143, 172, 174, 178-184 



Gonidiangium (go"nid-an'gi-um), 



178 



Gonidium, 213 

 Gooseberry, 706 

 Goose foot family, 705 

 Gracilaria, 173, 174, 175 

 Grama grass, 559, 562 

 Graminales, 657, 702 

 Graminese, 657, 702 

 Grape, 708 



Grass family, 657, 702 

 Grasses, 607, 625 



Grassland formation, 517, 526, 556 

 Grease woods, 564 

 Green algae, 158, 628 

 Ground covers, 471 

 Growth, 118-124, 380 

 Gulf weed, 170 



Gymnosperms, 311, 456, 653 

 Gymnosporangium, 194 

 Gynoecium, 320, 419, 451, 452 

 Gyrocephalus, 219 



Halophytes, 484, 563, 619, 621 

 Halophytic structures, 495 

 Harebell, 60 1 

 Harpochytrium, 214, 215 



Haustorium, 87, 88 



Hawk weed, 700, 711 



Hawthorn, 707 



Hazelnut, 452, 704 



Head, 428 



Heart leaf, 705 



Heat, 468, 504, 505 



Heath family, 709 



Heath moors, 578, 616 



Heather, 616 



Heliotrope, 710 



Heliotropism (he-li-ot'ro-pism), 



127-131, 133, 397 

 Helvellales, 217 

 Hemiascomycetes, 216 

 Hemibasidiomycetes, 218 

 Hepaticae, 242 

 Heteranthera, 627 

 Heterospory (het"er-os'po-ry), 434 

 Heterothallic, 180 

 Heterotrophic plants, 85 

 Heuchera americana, 602 

 Hickory, 704 

 Hickory nut, 452 



Hieraceum venosum, 700 

 Hilum, 101, 102 

 Hippocastanaceae, 686, 707 

 Holdfasts, 418 

 Hollyhock, 708 

 Homothallic, 180 

 Honeysuckle, 711 

 Hormogonales, 163 

 Horse-chestnut, 686, 707 

 Horsetails, 280-283 

 Hot springs, vegetation of, 624 

 Houstonia caerulea, 437; purpurea 



601; Houstonia, 711 

 Huckleberry, 709 

 Humus saprophytes, 85, 91, 709 

 Hybridization, 338 

 Hydnaceae, 210, 219 

 Hydnum coralloides, 210 

 Hydnum repandum, 211 

 Hydrocarbon, 75 

 Hydrodictyaceae, 161 

 Hydrodynamic forces, 467 

 Hydrophytes, 484, 620, 621 

 Hydrophytic structures, 490 

 Hydropterales, 295 

 Hydrotropism (hy-drot'ro-pism), 



133, 134, 412 

 Hygrophytes, 485 

 Hymeniales, 219 

 Hymenogastrales, 219 

 Hymenornycetes, 219 

 Hymenomycetineae, 219 

 Hymenophyllaceaa, 295 

 Hypericum, 708 

 Hypocotyl (hy'po-co"tyl), 101 

 Hypocreales, 217 

 Hypogenous, 425 

 Hyponasric (hy-po-nas'tic), 129 

 Hyponasty (hy'po-nas-ty), 129 

 Hysteriales, 217 



Impatiens, 707 



Impatiens fulva, 460 



Indian-grass, 559 



Indian-pipe, 709 



Indian-turnip, 662, 703 



Individual formations, 522-524, 526 



Indusium, 252 



Inflorescence, 426 



Insectivorous plants, 133, 610, 611, 



706 



Integument, 304 



Intramolecular respiration, 113, 114 

 ^Inulase, 108 



