INDEX TO ORDERS AND GENERA. 



PAGE. 



Gaura 38 



Gaylussacia 57 



Gentiaua 62 



Gentianaceae 62 



Gerardia 6S 



Geraniacese 18 



Geranium iS 



Geum 29 



Gillenia 2S 



Gleditschia . . . . ". 27 



Glyceria 12S 



Gnaphaliuni 50 



Gooclyera 94 



Graminese 120 



Gratiola 68 



Gymnocladus 26 



Gymnosticbum 130 



Habeuaria 95 



Halorageae 36 



Hamamelacese 36 



Hamamelis 36 



Hedeoma 72 



Heleuium 52 



Helianthemum 12 



Heliantbus 51 



Heliopsis 51 



Helleborus 5 



Hemerocallis 100 



Hepatica 1 



Heracleum 40 



Hesperis 11 



Hibiscus iS 



Hieracium 55 



Hippuris 36 



Holcus 126 



Hordeum 130 



Houstonia 44 



Hypoxys 97 



Hydrastis 5 



Hydrocbaridaceae. . . 93 



Hydrocotyle 38 



Hydropbyllaceae. . . 63 



Hydrophyllum 63 



Hypericacese 17 



Hypericum 17 



Hyssopus 71 



Humulus S3 



Ilex 19 



Ilicineae 19 



Illicebraceae 75 



Ilysanthes 68 



Impatiens 19 



Inula 50 



Ionidium 13 



Ipomoea 65 



Ir i d a c e se 96 



Iris 96 



Jeffersonia 6 



Juglandaceae 83 



Juglans 83 



Juncaceae ,. . . 100 



Juncus 100 



Juniperus 131 



Kalmia 59 



Labiatae 71 



PAGE. 



Lactuca 55 



Lamium 74 



Laportea 82 



Lappa . 53 



Larix 132 



Lathyrus 26 



Lauraceae 80 



Lechea 12 



Ledum 59 



Leersia 122 



Leguminosae 22 



Lemna 103 



Lemnaceae 103 



Lentibulaceas 70 



Leonurus 73 



Lepidium 12 



Leptocbloa 126 



Lespedeza 25 



Leucanthemum 53 



Levisticum 40 



Liatris 46 



Ligustrum 61 



Liliaceae 97 



Lilium 98 



Linaceae iS 



Linaria 67 



Linnaea 43 



Linum 18 



Lindera So 



Liparis 93 



Liriodendron 5 



Litbospermum 65 



Lobelia 56 



Lobeliaceae 56 



Lolium 130 



Lonicera 43 



Lopbantbus 73 



Lotus 23 



Ludwigia 37 



Lunaria 9 



Lupinus 23 



Lycbnis 15 



Lycium 66 



L3"Copersicum 67 



Lycopus 71 



Lysimacbia 61 



Lythraceae 3,7 



Lytbrum , . . . . 37 



Magnolia 5 



Magnoliaceae 5 



Maiautbemum 98 



Malva 17 



Malvaceae 17 



Marrubium 73 



Maruta 52 



Medeola 99 



Medicago 23 



Melampyrum 69 



Melastomaceae 36 



Melilotus 23 



Melissa 72 



Menispermaceae. . . . 6 



Menispermum 6 



Mentba 71 



Menyantbes 63 



