Hellebore, 25 Hellebore of the Ancients, 451 Hemerocallis, 447 Hemlock Spruce, 214 Hemp, 162 Henbane (_fig._ 71), 151 Hepatica, 22 Hepaticæ, 468 Herb Bennet, 58 Herb Robert, 336 Hibbertia, 240 Hibiscus, 297 Hickory (_fig._ 80), 180 Hilum, 39, 192, 324, 327 Hippocrataceæ, 313 Hippomane, 431 Hippophae, 428 Hippuris, 355 Hog Plum, 347 Holly, 344 Hollyhock, 299 Homalineæ, 346 Homeria, 443 Honey Locusts, 46 Honeysuckles, 381 Hop, 160 Hop Hornbeam, 202 Hordeum, 459 Hornbeam (_fig._ 92), 201 Hornwort, 355 Horned Poppy, 264 Horn of Plenty, 388 Horse Chestnut, 322 Horse-tail, 464 Hound’s-tongue, 409 House-leek, 365 Hovea, 40 Hoya carnosa, 403 Hudsonia, 275 Hugonia, 303 Humulus, 160 Hyacinth, 449 Hydrangea, 377 Hydroleaceæ, 407 Hydropeltis, 254 Hydrophylleæ, 410 Hyoscyamus, 151 Hypericum, 312 Hypoxis, 446 I. Iberis, 270 Iceland Moss, 469 Ice Plant, 367 Ilex aquifolium, 344 Ilex (_Quercus Ilex_, the Evergreen Oak), 194 Illecebrum, 365 Illicium, 241 Impari-pinnate leaf, 69 Impatiens, 338 Indian Arrowroot, 442 Indian Corn, 459 Indian Cress, 337 Indian Fig, 371 Indian Hawthorn, 71 Indian Lilac, 328 Indian Lotos, 257 Indian-rubber Tree, 173 Indian Shot, 442 Indusium, 393 Involucre (_fig._ 43), 98, 101 Ipecacuanha, 93 Ipomœa, 407 Ipomopsis, ib. Iris (_fig._ 148), 443 Iron Tree, 400 Isotoma, 392 Itea, 377 Ivy, 379 Ixia, 443 Ixora, 92 J. Jacaranda, 404 Jack Tree, 165 Jacobæa, 106 Jacob’s Ladder, 406 Jacquinia, 399 Jalap, 408 Jamaica Allspice, 359 Jambosa, ib. Jasmine (_fig._ 64), 134 Jatropha Manihot, 430 Jeffersonia, 253 Jointed, 44 Judas Tree, 47 Jujube lozenges, 345 Juncus, 456 Jungermannia, 468 Juniper (_fig._ 100), 225 Justicia, 415 K. Kadsura, 247 Kageneckia, 351 Kalmia, 128 Kalosanthes, 366 Keel, 37 Kentucky Coffee Tree, 48 Kenwood, 194 Kermes, 195 Kernelled fruit, 65 Kerria, 59 Keys, 310 King’s Spear, 449 Knautia, 389 Knawel, 365 Knot-grass, 365, 423 Kölreuteria, 327 L. Labiatæ, 412 Labrador Tea, 129 Laburnum, 35, 40 Lace Bark Tree, 427 Lachnæa, ib. Ladanum, 277 Ladies’ Mantle, 74 Lagenaria, 361 Lagerstrœmeria, 356 Lamb’s Lettuce, 388 Lamellæ, 470 Lamium, 414 Lamp-black, 209 Lantana, 415 Larch, 207, 216 Larix, 216 Larkspurs (_fig._ 10), 29 Lasiopetalum, 300 Lathræa, 416 Laudanum, 277 Laurel, 65 Laurestinus, 383 Laurus, 424 Lavatera, 299 Lawsonia, 356 Leadwort, 418 Leatherwood, 427 Lechea, 275 Lechenaultia, 393 Lecythis, 360 Ledum, 129 Leguminous Plants, 35, 349 Leiophyllum, 130 Lemna, 455 Lemon, 307 Lemon-scented Verbena, 415 Leontice, 253 Leptosiphon, 406 Leptospermum, 359