20 
GENERA OF 
Galax, 84 
Galeopsis, 138 
Galium, 114 
Gaultheria, 102 
Gaura, 29 
Gelsemium, 119 
Genista, 45 
Gentiana, 120 
Geranium, 70 
Gerardia, 131 
Geum, 41 
Gilia, 123 
Gillenia, 41 
Glaucium, 45 
Glaux, 127 
Glechoma, 138 
Gleditschia, 45 
Glottidium, 45 
Glycine, 45 
Glycirrhiza, 45 
Gnaphalium, 113 
Gonolobus, 118 
Goodyera, 155 
Gordonia, 21 
Gratiola, 130 
Grindelia, 113 
Gymnocladus, 45 
Gymnopogon. 171 
Gymnostylis, 113 
Gynandropsis, 11 
Gyromia , see Medeola 
Habenaria, 155 
Halesia, 100 
Halseya, 45 
Hamamelis, 25 
Hamiltonia, 38 
Hapalostachyum, 113 
Harpalyce, 113 
Hedeoma, 138 
Hedysarum, 45 
Helenium, 113 
Helianthemum, 77 
Helianthus, 113 
Heliopsis, 113 
Heliotropium, 140 
Helonias, 158 
Helosciadium, 2 
Hemianthus, 130 
Hepatica, 3 
Heracleum, 2 
Herpestis, 130 
Hesperis, 9 
Heteranthera, 159 
Heuchera, 24 
Hibiscus, 19 
Hieracium, 113 
Hippuris, 30 
Hippophae, 36 
Holcus, 171 
Holosteum, 81 
Hopea, 100 
Horkelia, 41 
Hordeum, 171 
Hosaclria, 45 
Hottonia, 127 
Houstonia, 120 
Hudsonia, 77 
Humulus, 46 
Hydrangea, 116 
Hydrastis, 3 
Hydrochloa, 171 
Hydrocotyle, 2 
Hydrolea,l 24 
Hydrocharis, 145 
Hydropcltis , see Brasenia 
Hydrophyllum, 141 
Hyoscyamus, 132 
Hymenopappus, 113 
Hymenophyllum, 174 
Hypericum, 23 
Hypopeltis , see Woodsia 
Hypoxis, 149 
Hypopithys , see Monotropa 
Hyptis, 138 
JHyssopus, see Lophanthus 
Jatropha, 55 
Iberis, 9 
Jeffersonia, 8 
Ilex, 99 
Illicium, 14 
Impatiens, 72 
Imperitoria, 2 
Indigofera, 45 
Inula, 113 
Ionidium, 74 
Ipomcea, 122 
Jpomeria , see Ipomopsis 
Ipomopsis, 123 
Iresine, 88 
Isanthus, 138 
Isnardia, 29 
Isoetes, 176 
Itea, 24 
Juglans, 54 
Juncus, 157 
Juniperus, 143 
Jussisea, 29 
Justicia, 133 
Iva, 113 
Ixia , see Nemostylis 
Kalmia, 102 
Kleinia, 113 
Kobresia, 172 
Kochia, 90 
Keeler ia, 171 
Krameria, 73 
Krigia, 113 
Kuhnia, 113 
Kyllingia, 172 
Lachnanthes 151 
Lactuca, 113 
Lamium, 138 
Lantana, 137 
Larbreea, 81 
Larix, 145 
Lapsana, 113 
Lathyrus, 45 
Laurus, 16 
Lechea, 77 
Ledum, 102 
Leersia, 171 
Leimanthium, 158 
Leiophyllum, 102 
Lemna, 170 
Leontice, 17 
Leontodon, 113 
Leonurus, 138 
Lepuropetalon, 24 
Lepidium, 9 
Leptochloa, 171 
Leptandra, 130 
Leptarrhena, 24 
Leptanthus , see Heteranthera 
Leptocaulis, 2 
Leptopoda, 113 
Lepturus, 171 
Lespedeza, 45 
Leucas, 138 
Lewisia, 85 
Liatris, 113 
Ligusticum, 2 
Lilium, 163 
Limosella, 9 
Limnetis, 171 
Lindernia, 130 
Linnsea, 116 
Linum, 80 
Liparis, 155 
Liquidambar, 52 
Liriodendron, 13 
Lisianthus. 000 
Listera, 155 
Lithospennum, 139 
Lobelia, 106 
Lolium, 171 
Lonicera, 116 
Lophiola, 151 
Ludwigia, 29 
Lunaria, 9 
Lupinus, 45 
Luzula, 157 
Lychnis, 81 
Lycium, 132 
Lycopodium, 175 
Lycopsis, 139 
Lycopus, 138 
Lygodesmia, 113 
Lygodium, 174 
Lyonia , Nutt, see Andromeda 
Lysimachia, 127 
Lythrum, 33 
Macbridea, 138 
Maclura, 48 
Macrotys, 3 
Magnolia, 13 
Mahonia , see Berberis 
Malacodendron, 21 
Malaxis, 155 
Malope, 19 
Malva, 119 
Mammillaria, 28 
Manisurus, 171 
Maranta, 156 
Mariscus, ] 72 
Marrubium, 138 
Marsilea, 176 
Marshall ia, 113 
Maurandia, 130 
Martynia, 134 
Matalea, 1.18 
Meconopsis, 4 
Medicago, 45 
Melampyrum, 131 
Melanthium, 158 
Melananthera, 113 
Melia, 64 
Melica, 171 
Melilotus, 45 
Melissa, 138 
Melothria, 108 
Menispermum, 18 
Mentha, 138 
Menyanthes, 120 
Mentzelia, 32 
Menziesia, 102 
Mercurialis, 55 
Micranthemum,127 
Micropetalon, seeStellaria 
Microstylis, 155 
Meigia, 171 
Mikania, 113 
Milium, 171 
Mimulus, 130 
Mitchella, 115 
Mitella, 24 
