Helichrysum, 376 
Helicophyllaceae, 351 
Heliotropium, 366 
Helminthocladiaceae, 338 
Helotiaceae, 342 
Helotium, 342 
Helvella, 342 
Helvellaceae, 342 
Helvellales, 217, 342 
Helvellas, 342 
Hemiascales, 223, 344 
Hemlocks, 281 
Hepatica, 291 
Hepaticae, 244, 348 
Heppiaceae, 340 
Heptane, 153 
Heracleum, 315, 372 
Herbarium Mold, 221 
Hernandiaceae, 371 
Herposteiraceae, 333 
Herposteiron, 333 
Hesperidin, 149 
Heterocysts, 165 
Heteroecism, 234 
Heterogametes, 174 
Heterogamous, 110 
Heterospores, 255 
Heterothallic, 191 
Heuchera, 369 
Hibiscus, 362 
Hickory, 314 
Hicoria, 314, 372 
Hieracium, 377 
Higher Fungi, 211, 339 
Lycopods, 267, 354 
Red Seaweeds, 339 
Tube Algae, 336 
Highest plant, 313 
Himanthalia, 337 
Himanthaliaceae, 337, 371 
Hippocrateaceae, 371 
Hippuridaceae, 370 
Histology, 27, 43 
Hollyhock, 305 
Holophytes, 88 
Holoplastideae, 164, 167, 332 
Homothallic, 197 
Honey Locust, 319 
Honeysuckle, 311, 373 
Hookeriaceae, 351 
Hormogonales, 165, 330 
INDEX 
Hormogones, 163 
Hornworts, 245, 349 
Horsemint, 306 
Horsetails, 262, 353 
Houstonia, 373 
Hoya, 367 
Humiriaceae, 363 
Humpback Mosses, 252, 351 
Humulus, 362 
Husks, 298 
Hyacinth, 320 
Hyaloriaceae, 346 
Hyalotheca, 333 
Hydnaceae, 230, 346 
Hydnoraceae, 370 
Hydnum, 346 
Hydrales, 360 
Hydrangea, 369 
Hydrangeaceae, 369 
Hydrocharitaceae, 360 
Hydrochinin, 150 
Hydrochloric acid, 139 
Hydrocyanic acid, 148 
Hydrodictyaceae, 332 
Hydrodictyon, 172, 332 
Hydrophyllaceae, 366 
Hydrophyllum, 366 
Hydrophytes, 320 
Hydrostachydaceae, 364 
Hygroscopic movements, 116 
Hymenium, 213, 226 
Hymenogastraceae, 344 
Hymenogastrales, 227, 344 
Hymenophyllaceae, 258, 352 
Hymenophyllum, 352 
Hyoscyamine, 150 
Hyperplasy, 134 
Hypertrophy, 134 
Hyphae, 189 
Hypnaceae, 252, 351 
Hypnodendraceae, 351 
Hypnum, 351 
Hypochnaceae, 346 
Hypocreaceae, 343 
Hypodermataceae, 343 
Hypoplasy, 134 
Hypopterygiaceae, 351 
Hypoxis, 360 
Hypoxylon, 343 
Hysterangium, 344 
Hysteriaceae, 343 
393 
